noun
one-night stand; single sexual encounter
Wasei-eigo from English 'one night love'. Used for a single sexual encounter without ongoing relationship.
wasei-eigo (Japanese-coined English), from one night love
彼とはワンナイトラブの関係だった。
It was a one-night stand with him.
ワンナイトラブを経験したことがありますか?
Have you ever had a one-night stand?