"Sweaty Wap: When you're having vigorous sex with someone on top, and your sweat drips off your body, into one of their eyes, momentarily blinding them"
I was doing Gabby missionary style last summer. Her AC was broken, and I ended up giving her a Sweaty Wap.
Similar to the "mushroom stamp", this procedure is done first with a male unzipping his fly and then proceeding to dish out a killer mushroom stamp...ie: slapping female with penis
I told my girl to clean the house, and if she doesn't I'll be forced to put my beer down and zip wap the bitch...