it means to put water in body holes such as the mouth, belly button, vagina or other places and have another person drink or lick it up.
Guy 1: ''i was qwenching with your girlfriend last night."
Guy 2: ''fuck you dude!''
Guy 1: ''i can teach you."
Gur 2: ''fine."
by Axel Tension January 14, 2022
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