When you are at Waffle House at 3am and it is a better use of your syrup-smothered waffle to slap it across the face of your drunk buddy sitting in front of you, rather than to eat it. It has a better effect if you have ordered your waffle with chocolate chips as they give the waffle more weight as well as velocity with the slap.
Me: Hey the waffle house cooks been ashing his cig in my waffle again while he cooks it.
Dude: Are you gonna eat it?
Me: No, I'm gonna waffle slap the shit outta Andrew with that damn waffle when he gets back!
When a guy wraps noodles around his dick, puts a condom on and fucks the woman till he comes. He then removes the condom, slaps her with the wet noodles and then feeds them to her.
When the male partner has diareha and shits in the female partners mouth. The the female opens her mouth and the male dips his nut sack in her mouth. Then slaps the female in the face with it. Leaving a mud like substance on her face. (Mississippi Mud Slap)