flex
B2Both informal and formal, with 'to show off' meaning being informal/slang.
Definition
Meaning
To bend something, often a limb or material, without breaking; to show elasticity or adaptability.
To show or demonstrate something, typically a skill, ability, or attribute, often in a way intended to impress others. Also, a flexible electrical cable (noun).
Linguistics
Semantic Notes
Verb (1): Physical bending. Verb (2): Informal, metaphorical display of power, wealth, skill. Noun: A type of insulated electrical wire.
Dialectal Variation
British vs American Usage
Differences
Noun 'flex' (for electrical cable) is standard in UK English; US English uses 'cord' or 'wire'. The informal verb meaning 'to show off' is common in both.
Connotations
In both, 'flex' as a physical verb is neutral. The informal verb can be positive (showing legitimate skill) or negative (boastful).
Frequency
The slang verb is slightly more recent and prominent in US media but now fully established in both varieties. The noun is high-frequency in UK domestic contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
flex + object (He flexed his arm)flex + object + adverb/preposition (She flexed to show her strength)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “flex your muscles”
- “on flex (slang, unreliable)”
Usage
Context Usage
Business
Refers to adaptable systems or schedules (e.g., flexi-time).
Academic
Used in physics/engineering regarding materials; in sociology regarding social power.
Everyday
Common for physical movement and informal boasting.
Technical
In anatomy (muscle flexion), electrical engineering (flexible cable).
Examples
By Part of Speech
verb
British English
- He had to flex the pipe to fit it round the corner.
- Don't just flex your new phone; nobody cares.
American English
- Flex your knees when you lift heavy boxes.
- She's always flexing about her connections on social media.
adverb
British English
- N/A (Flex is not an adverb)
American English
- N/A (Flex is not an adverb)
adjective
British English
- N/A (Flex is not standard as an adjective; use 'flexible')
American English
- N/A (Flex is not standard as an adjective; use 'flexible')
Examples
By CEFR Level
- The yoga teacher said to flex your fingers.
- This material can flex a little.
- He flexed his arm to show the bandage was tight.
- We need to flex our plans based on the weather.
- The company began to flex its market power against smaller competitors.
- Can you flex the meeting time to 3 PM?
- The influencer's post was a subtle flex, highlighting the luxury resort in the background.
- The polymer's ability to flex under stress without fracturing is remarkable.
Learning
Memory Aids
Mnemonic
Think of FLEXible gymnasts who BEND and also SHOW OFF their skills.
Conceptual Metaphor
SHOWING OFF IS PHYSICALLY FLEXING A MUSCLE; ADAPTABILITY IS PHYSICAL FLEXIBILITY.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate slang 'flex' (show off) as 'гнуть' (to bend). Use 'хвастаться', 'выставлять напоказ'.
- The noun 'flex' (cable) translates as 'провод', 'шнур', not 'флекс'.
Common Mistakes
- Using 'flex' as a countable noun for 'muscle flex' instead of 'muscle flexion'.
- Overusing the slang in formal contexts.
Practice
Quiz
In UK English, what does the noun 'flex' most commonly refer to?
FAQ
Frequently Asked Questions
It has both formal and informal uses. The physical meaning is standard. The 'show off' meaning is informal/slang.
'Flex' often implies a temporary, controlled, or elastic bending, especially of a joint or flexible material. 'Bend' is more general.
Yes, primarily in British English meaning an electrical cable ('extension flex'), and informally meaning an act of showing off ('That was a major flex').
It derives from bodybuilders flexing their muscles to display them, which metaphorically extended to displaying any asset, skill, or status.