Definitions from Wiktionary (fatten up)
▸ verb: (transitive) To cause to gain weight by means of feeding.
▸ verb: (intransitive) To become fat or fatter by gaining weight.
▸ verb: (transitive, figurative) To make bigger; to expand.
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▸ verb: (transitive) To cause to gain weight by means of feeding.
▸ verb: (intransitive) To become fat or fatter by gaining weight.
▸ verb: (transitive, figurative) To make bigger; to expand.
Similar:
fatten,
flesh out,
fat,
plump,
fill out,
fatten out,
plump out,
bulk up,
gain,
put on the pounds,
more...
Opposite:
▸ Words similar to fatten up
▸ Usage examples for fatten up
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▸ Wikipedia articles (New!)
▸ Words that often appear near fatten up
▸ Rhymes of fatten up
▸ Invented words related to fatten up