the large amount of semen left on a bar skank after the man has pulled out and ejaculated all over her back or chest. this semen is then rubbed into the skin while attempting to wipe it off; thus leaving a moisturized feeling
brotato: Hey man, did you end up slaying that River Rat last night?

bro: Yeah dude. She came back to my place and I gave her some Manayunk moisturizer on her back after I fucked her from behind.

brotato: haha. skank!
by king j$ July 26, 2010
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