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.
ayon kay bunkbuddies ika-09 ng Mayo, 2010
Can you define these popular missing words?
Where a group of Multicultral people wank each other off (in a whole group)
Rainbow wank is my good friend
ayon kay Bitch man ika-06 ng Agosto, 2006
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.
ayon kay Wet Wet Wet Wet ika-19 ng Agosto, 2010