expression
Internet slang used to express laughter, similar to 'LOL' or 'haha' in English. Often used at the end of sentences or as a standalone reaction. The reading わらい is also possible but less common.
See also: 笑い
その動画おもしろすぎる笑
That video is too funny lol
今日も遅刻したｗ
I was late again today haha
Rarely used kanji form; originally means 'straw' but used here as ateji for わら.
笑い is the standard noun for 'laughter' or 'a laugh', while 笑 is an internet slang expression equivalent to 'LOL'.
Derived from the kanji 笑 (laugh), used as internet slang to indicate laughter. The reading わら comes from the kun'yomi of 笑う (warau).