backside
C2informal, slightly humorous when referring to body part; neutral when referring to objects.
Definition
Meaning
The posterior part of the human body; the buttocks.
The reverse or less visible side of something; the rear or back part of an object.
Linguistics
Semantic Notes
Primary meaning (body part) is informal but not vulgar. Secondary meaning (rear of object) is standard and neutral. Context is crucial for disambiguation.
Dialectal Variation
British vs American Usage
Differences
In UK English, the bodily sense is more common and considered a standard, slightly childish/polite term. In US English, 'butt' or 'rear' is more frequent for the body part; 'backside' for an object is common in both.
Connotations
UK: Often used with children or in a light-hearted, non-offensive way. US: Can sound slightly old-fashioned or British when referring to the body.
Frequency
Higher frequency in UK English for the bodily sense. Comparable frequency in both varieties for the object sense.
Vocabulary
Collocations
Grammar
Valency Patterns
[verb] + backside (e.g., sit on your backside)[preposition] + the backside of + [noun] (e.g., on the backside of the hill)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “a pain in the backside (annoyance)”
- “work your backside off (work extremely hard)”
Usage
Context Usage
Business
Rare, except in informal expressions like 'a pain in the backside' referring to a difficult issue.
Academic
Neutral term for the reverse side of an object or concept (e.g., 'the backside of the fabric').
Everyday
Common for the body part (especially UK) and for the rear of physical objects.
Technical
Used in manufacturing, design, and astronomy (e.g., 'the backside of the wafer', 'the backside of the moon').
Examples
By Part of Speech
verb
British English
- N/A
American English
- N/A
adverb
British English
- N/A
American English
- N/A
adjective
British English
- N/A
American English
- N/A
Examples
By CEFR Level
- He fell and hurt his backside.
- Look at the backside of the photo.
- The children were told to sit on their backsides and listen.
- The signature is on the backside of the document.
- After that long hike, my backside was quite sore.
- The artist painted a detailed scene on the backside of the canvas.
- The proposal was scribbled on the backside of a napkin during the meeting.
- He's been a real pain in the backside throughout this whole negotiation.
Learning
Memory Aids
Mnemonic
Think of 'BACK' where you SIT and you have your BACKSIDE.
Conceptual Metaphor
THE BODY IS AN OBJECT (having a front and a back).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct calque 'задняя сторона' for the body part; use 'задница' or 'попа' (informal) instead. For objects, 'задняя сторона' or 'тыльная сторона' is correct.
Common Mistakes
- Using 'backside' in formal medical or anatomical contexts (use 'buttocks'). Confusing it with 'backyard' (different meaning).
Practice
Quiz
In which context is 'backside' most likely to be considered informal?
FAQ
Frequently Asked Questions
No, it is informal but not rude or vulgar. It is a polite alternative to stronger slang terms for the buttocks.
No, it frequently refers to the rear or less visible side of an object, as in 'the backside of the hill'.
UK speakers use it more freely for the body part. US speakers often prefer 'butt' or 'rear' and may find 'backside' slightly quaint or euphemistic for the body.
No, 'backside' is only a noun. The similar-sounding verb is 'backslide' (to relapse into bad habits), which is unrelated.