The damp remnants of a sex act, placed on the sheets, blanket, couch, backseat upholstery, or communal tarp. Arguments have spawned about which partner has the indignity and discomfort of sleeping in said spot.
When a girl has deep sexual feelings towards a guy or another woman she has a wet spot for them. Having a lust on for another person. A lot like a soft spot, but hotter.
God damn, that Johnny Depp! I've got a real wet spot for him!
Do you see the wayJan looks at Greg? She's got an obvious wet spot for him.
A "wet spot" is a toilet prank much like the upper decker. It also works better if you're a guy but if you're female, bonus points for you. At the end of your leak aim a little higher just enough so you dampen the back of the toilet seat. Hopefully somebody will come in and sit without noticing, giving them a nice slick tail bone. :-) Good times.
"I was at the party and I overheard Jacksay he needed to pinch off a loaf so I ran in the can before he and left him a "wet spot" to enjoy later."