A rhyming pair of verbs meaning for one to get topped off, (a.k.a. getting head) and then for one to flop over to get a back rub. First you top, then you flop!
Gregory's girlfriend Drea is a keeper, she gives him a top n flop every day!

Whatta lucky dude, he gets topped off - head in bed - and then flops over for back massage on the regular. He calls this her top & flop move!
by dr.drea3000 June 16, 2020
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