Is 'flathead' a common word?

No, it is low-frequency in general English but common within specific technical fields and regional slang.

Can I use 'flathead' to insult someone in the UK or US?

It is not a recognised insult in those varieties. Using it may cause confusion rather than offence. It is primarily Australian/NZ slang.

What is the difference between a flathead and a Phillips head screw?

A flathead screw has a single, straight slot. A Phillips head has a cross-shaped slot. They require different screwdrivers.

Are all flathead fish related?

The common name 'flathead' applies to several species from different families (e.g., Platycephalidae, Percichthyidae), but they share the morphological trait of a flattened head.

Is “flathead” formal?

Flathead is usually technical (ichthyology, engineering), informal (slang) in register.

How do you pronounce “flathead”?

Flathead: in British English it is pronounced /ˈflat.hɛd/, and in American English it is pronounced /ˈflæt.hɛd/. Tap the audio buttons above to hear it.

flathead: meaning, definition, pronunciation and examples

UK/ˈflat.hɛd/US/ˈflæt.hɛd/

Technical (ichthyology, engineering), Informal (slang)

My Flashcards

Quick answer

What does “flathead” mean?

A type of fish with a flattened head, or a type of screw or bolt with a flat, countersunk head.

Audio

Pronunciation

Definition

Meaning and Definition

A type of fish with a flattened head, or a type of screw or bolt with a flat, countersunk head.

Informally, can refer to a foolish or stupid person (derogatory, chiefly Australian/NZ). Also used in automotive contexts for a type of engine (flathead engine).

Dialectal Variation

British vs American Usage

Differences

The informal slang meaning (fool) is primarily Australian and New Zealand English, not standard in UK or US. The technical meanings (fish, screw) are understood in both.

Connotations

Neutral in technical contexts. Strongly derogatory in slang contexts.

Frequency

Low frequency in general English. Higher frequency in specific technical fields (fishing, mechanics) and in Australian/NZ informal speech.

Grammar

How to Use “flathead” in a Sentence

[Adj] flatheadflathead [Noun][Verb] a flathead

Vocabulary

Collocations

strong

flathead catfishflathead screwflathead engineflathead mullet

medium

catch a flatheaduse a flatheadold flatheaddusky flathead

weak

flathead designflathead speciesflathead boltflathead model

Examples

Examples of “flathead” in a Sentence

noun

British English

The angler was thrilled to land a large dusky flathead.
You'll need a flathead screwdriver for that fastener.

American English

Flathead catfish are a popular sport fish in the Mississippi River.
The classic Ford V8 was a flathead engine.

Usage

Meaning in Context

Business

Rare. Potentially in hardware manufacturing or fishing industry reports.

Academic

Used in biology/ichthyology papers and engineering/automotive history texts.

Everyday

Rare in everyday UK/US English. Common in Australian/NZ informal speech.

Technical

Standard term in mechanical engineering (fasteners), automotive engineering (engines), and ichthyology.

Vocabulary

Synonyms of “flathead”

Strong

idiot (slang)fool (slang)moron (slang)

Neutral

countersunk screwPlatycephalidae (fish family)

Weak

dullard (slang)simpleton (slang)

Vocabulary

Antonyms of “flathead”

geniusphillips head (screw type)roundhead

Watch out

Common Mistakes When Using “flathead”

Using 'flathead' to refer to any screw (only specific to countersunk types).
Using the slang meaning in formal or international contexts where it is unknown/offensive.
Confusing with 'Phillips head' or 'Torx' screw types.

FAQ

Frequently Asked Questions

: No, it is low-frequency in general English but common within specific technical fields and regional slang.
: It is not a recognised insult in those varieties. Using it may cause confusion rather than offence. It is primarily Australian/NZ slang.
: A flathead screw has a single, straight slot. A Phillips head has a cross-shaped slot. They require different screwdrivers.
: The common name 'flathead' applies to several species from different families (e.g., Platycephalidae, Percichthyidae), but they share the morphological trait of a flattened head.
: A type of fish with a flattened head, or a type of screw or bolt with a flat, countersunk head.
: Flathead is usually technical (ichthyology, engineering), informal (slang) in register.
: Flathead: in British English it is pronounced /ˈflat.hɛd/, and in American English it is pronounced /ˈflæt.hɛd/. Tap the audio buttons above to hear it.

Phrases

Idioms & Phrases

“Not applicable for this technical/slang term.”

Learning

Memory Aids

Mnemonic

Imagine a FISH with a head so FLAT you could use it as a SCREWDRIVER.

Conceptual Metaphor

STUPIDITY IS LACK OF DEPTH/CONTOUR (flat head = empty head).

Practice

Quiz

Fill in the gap

To assemble the furniture, you will need a screwdriver for the countersunk screws.

Multiple Choice

In which context is 'flathead' considered neutral and technical?