also: わらた
expression
Internet slang derived from 笑った (waratta, 'I laughed'). Used in casual online communication to express laughter, similar to English 'LOL' or 'haha'. The ロ/ラ variation is a playful spelling shift.
あの動画見た?ワロタw
Did you see that video? LOL.
ワロタ。まさかそんなオチとは。
Haha, I didn't expect that punchline.