A basin bang is when you bang your girlfriend or a random girl you just scored in a public washroom.
Usually it’s a quickie sex session in the washroom of a bar, club, brewery, restaurant or gym!
Mostly takes place on the basin or toilet seat.
“Where’s Rob and Jen? They’ve been gone for a long time”
“Oh... bet they’re having a basin bang”
“That basin bang screwed up my injured back, the seat was too low”
“That chick and me had a hot basin bang at the pub. She got stuck on the tap, it flooded and we had to call 9-1-1” !!
when you hover over someone and let your leaky shit water drip into their belly button
ok ill let you water basin if you let me chilidog