Birdbath

[Renato]

when you pull your nutsack up, forming a cup, then pour a shot of liquor into it and have a girl suck the shot off of your sack

[Michiko]

A small basin placed in a garden and filled with water for birds to bathe in.

[Gregory]

Achieved by taking your lady friend from behind, either on her knees or stomach. One pulls out prior to busting, aiming their shaft in the direction of the small of her back and proceeds to unload. The small of her back will cup the load allowing a pooling effect which is known as a birdbath.

[Couch Potatoe]

a bowl filled with water for birds to drink and bathe (= cover themselves in water) in