What does fatter mean?
'Fatter' is the comparative form of the everyday English adjective 'fat'. It describes someone or something possessing more body flesh or weight relative to another, or a substance containing a greater proportion of fat — as when comparing cuts of meat, dairy products, or fuel mixtures. Because comparatives demand a reference point, 'fatter' typically appears alongside 'than' or within constructions like 'the fatter of the two'. Its connotations depend heavily on context: applied to animals at a livestock show or to profit margins and paychecks, it is neutral or even positive, while applied directly to human bodies it can come across as insensitive, prompting many speakers to choose softer alternatives. The underlying word traces back to Old English 'fætt', meaning fattened, reflecting a time when plumpness in livestock signified value. It remains a common, useful word wherever direct comparison of size or richness matters.
adjectiveThe comparative form of 'fat': having more flesh or body weight than another person or thing, or containing more of a fatty substance.
- Having more body flesh or weight than something else (comparative of 'fat').
- Containing a higher proportion of fat than something else, as in food or fuel.
"After a winter of hearty stews, the cat emerged noticeably fatter in spring."
"The fatter of the two lambs won first prize at the county fair."
"Nutrition labels now reveal which snack is fatter per serving than it appears."
In Old English, 'fat' didn't mean plump by accident — it literally meant 'fattened up,' describing an animal deliberately fed for slaughter.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of fatter
'Fatter' derives from the Old English adjective 'fætt', which meant 'fattened' — originally the past participle of a verb meaning to fatten an animal. This descends from Proto-Germanic roots shared across the West Germanic languages, making the German noun 'Fett' (grease) and the Dutch adjective 'vet' genuine cognates. The word has kept its basic form and meaning through more than a millennium of English, with the comparative ending '-er' added in the standard Middle English pattern.
Related word forms
How fatter is actually used
As a comparative adjective, 'fatter' requires an explicit or implied point of comparison ('fatter than', 'the fatter of the two'). Applied to people's bodies, it can read as blunt or unkind in many social contexts, so speakers often prefer gentler phrasing such as 'heavier' or 'more full-figured'. In discussions of food, however, 'fatter' is neutral and purely descriptive.
Easily confused with fatter
'Father' means a male parent, while 'fatter' is simply the comparative of the adjective 'fat'; the words share a similar shape but entirely different meanings.