hanky-panky

Meaning

Noun

• Mischievous behaviour, dishonest or shady activity.
• Amorous behaviour, smooching, making out, necking, sexual intercourse or other sexual activity, especially if illicit.
• A debaucherous act; a sexual act that is considered inappropriate.

Origin

• Possibly a corruption of the Romani expression hakk'ni panki ("great trick", "big con" and hence "shady dealings").