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 group of women whose autocorrect on their phones came up with this phrase. In turn they used it to form a group of women that claim to be of higher standard than others.
The higher standard can only be proven on internet forums, since there is proof of them in real life.