hanky-panky
noun /ˌhæŋki ˈpæŋki/
/ˌhæŋki ˈpæŋki/
[uncountable] (old-fashioned, informal, humorous)- sexual activity or slightly dishonest behaviour that is considered bad but not very seriously bad
不得体的性行为；调戏；不正当性活动 - There was all sorts of hanky-panky going on at the party.
聚会上发生了各种各样的恶作剧。
词源mid 19th cent.: perhaps an alteration of hokey-pokey. - There was all sorts of hanky-panky going on at the party.