Rainbow wank

When you masturbate for so long there is blood from chaffing, by the time you ejaculate the semen will be mixed with blood.

Dude I was masturbating for so long last night I gave myself a rainbow wank.

by bunkbuddies May 9, 2010

rainbow wank

Where a group of Multicultral people wank each other off (in a whole group)

Rainbow wank is my good friend

by Bitch man September 11, 2008

Rainbow Wank

When you kneel on the floor, pants down, cock in hand, then lay out all your favourite porn mags on your preferred climax pages in a rainbow shape around you and then have a wank.

My Mum walked in on me having a rainbow wank last night! I couldn't hide the porn mags quick enough.

by Wet Wet Wet Wet August 19, 2010