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2.
To insert one's head into the vaginal orrafice
When Susie came back, she asked me to give her a showercap.
by comfymilk March 01, 2006
 
1.
The act of stretching your scrotum over the head of a:
1. Passed out person
2. Anyone willing
I gave Em a shower cap while she was passed out on the floor.
by Marvin the man April 17, 2006
 
3.
The hat you wear to go out when you didn't shower.
I always throw on a shower cap to cover my hair when I didn't bathe.
by Semiuseful Magazine September 07, 2009