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1.
To thrust one's penis inside a vagina repeatedly.
Dseeamn, I'm gonna be hittin the skins with yo mama tonight.
by mike hunt February 11, 2003
 
2.
To have sex with a woman; term refers to the outer labia; see also giving skins
P1: Damn, G, that bitch let you hit the skins?

P2: Fo' shizle!
by John The Fisherman October 13, 2002
 
3.
To forcibly insert the penis into the vagina.
But I'm wicked, G, hit the skins but never quickly (lyric from Salt 'N Pepa's '93 hit Shoop)
by GuidoPosse69 February 22, 2005