During sex, the women grabs onto the man boobs and squeezes them together to form a "fake vagina" and the women uses her dildo to fuck the mans chest.
Women - "Yeah, see that guys moobs? I just lopinated them!"

Friend of Women - "That is awesome! My man is buff and has no moobs!"

Women - "You should make him fat to lopinate him"
by Lipkieg April 10, 2008
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The action of a ball-sack 'clacking' on taint while in the doggy-style position.
Guy: "We gotta switch positions."

Girl: "What's wrong?"

Guy 1: "The Dogs are lopin!"
by Papitopapito April 21, 2011
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