Skimmer: a term often used to describe either an action or an object in a sketchy or greasy manner. The word can be used to describe anything that cannot possibly be defined as something worthy of being normal. This version of the word can almost be defined by merely saying the word itself, as just saying it will send greasy vibes to anyone that hears it.
Skimmer is a guy who "rides the top of the crest" during sex! Skimming is just bouncing off a partner's 'rear-end', quick insertion, then pulling out, leaving the sodomized partner feeling rather hungry for alot more.
"That dude made me want more and more of the sauce, but he wasn't very deep, just another skimmer"