The act of strapping your sex partner's arms to a ceiling fan, laying underneath them with your dick in their orifice, and turning the fan on so they spin around on your dick.Usually accompanied by helicopter sound effects or yelling.
"Speaking of Helicopters, my girlfriend gave me a Black Cock Down last night."
by Keeperofreptiles November 17, 2012
black cock down- when your girl is naked on the bed run and jump whilst having an errection and land your dick straight into her pussy
dude me and your mom last night got sick of playing trival pusuit so instead we i landed a black cock down on her helipdad if you know what i mean
by tripp and justin made this November 10, 2007