An onomatopoeic adverb expressing doing something quickly and briskly. Used when moving lightly/quickly or finishing something briefly.
朝は時間がないので、ささっと朝ごはんを食べて出かけた。
I was short on time this morning, so I ate breakfast quickly and left.
問題をささっと片付けて、午後は休憩しよう。
Let's deal with the problem quickly and rest in the afternoon.
料理はささっと作った方が味が落ちないこともある。
Sometimes cooking quickly preserves the flavor better.