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2.
The female act of depositing the males semen on to the male, preferably on chest or lower torso, after sexual intercourse.
Cody: Did you hear what Sarah did to Brandon last night?
Keeley: No?!
Cody: She totally gave him bird droppings!
Keeley: Eurgh, that's gross dude!
Cody: Yeah, but sensual...
by Stergus November 17, 2012
 
1.
The act of masturbation from a place of great height (buildings, helicopters, radio towers) so as to hit a person or other object with your semen.
I was so bored last night that for a thrill, I went bird dropping.
by Birddropper April 04, 2006