godan verb (-ru), intransitive verb
put on weight; get fat
Slang verb derived from the onomatopoeia ぽちゃ (plump, chubby). Used casually for gaining weight, often with a self-deprecating or lighthearted tone.
See also: ぽちゃ
最近食べすぎて、ちょっとぽちゃったかも。
I've been eating too much lately and might have put on a little weight.
冬の間はどうしてもぽちゃるよね。
It's hard not to gain weight during winter, isn't it?