adverb
aimlessly; casually; by chance; suddenly
Mimetic adverb describing an unplanned, casual, or sudden action. Often used with movement verbs like 立ち寄る, 出かける, or 入る to mean dropping by or going somewhere without a fixed purpose.
See also: ふらり
休みの日は、ふらっと近所のカフェに行く。
On my days off, I casually drop by a nearby café.
ふらっと立ち寄った店で、いい本を見つけた。
I found a good book at a shop I wandered into by chance.