When a sexy hipster appears at a party, or a delectable scene kid walks by.. this is the aftermath, of every hipster/scene girls vaginas.
"Hot bricks of Jesus, he makes me moist in the snack cake"
"Look at all these hipsters! mhmm im moist in the snack cake"
"I like the pole and the hole, and right now I'm as moist as a snack cake down there. So, why don't you come over to my crib after school, and I'll make your pinky aaaall stinky." - Strangers With Candy
an extra slice of gravy-soaked bread inside a turkey sandwich to make it extra moist. Monica on "Friends" invented it and Ross named it. Ross got really upset one time, when his boss ate his sandwich with a moistmaker.