Blotch is thicc fluffin cat with the fattest booty cheeks u have ever seen and gets punished by the 2 inch every single morning and has a stretched asshole because of the 2 inch and now lives on the street with a failed pornstar.
Wet flatulence, or the mark thereof in one's underwear. Unexpectedly or accidentally emitting liquid or solids with the gas. (Similar to skidmark, which may also relate to poor wiping technique.)
Dad: <wet farting sound> "Uh oh."
Joe: "Did you get any on you?"
Dad: "Yes, I believe I may have blotched."
A blowjob with biting. Teeth. Lots of teeth. Guys, run away from this as fast as you can. It doesn't matter how hot that girl is, your dick is worth more than that.
"So I was with this hot chick, and she was about to suck my dick, but then she talked about giving me a blowchomp or some shit like that, so I fucking jacked my shit off."