This is a move best pulled in a warmer environment. The art of pulling your scrotum over your fist, resembling a swimcap.
"When I turned around he was giving me the swimcap!"
by medic980 October 20, 2008
1 more definition
To insert ones head into a females vagina
yo last night the girls vag was so big she swim capped me
by 1231234 February 12, 2009