Some person who would give a female streamer all of their money, and brag about it as being the "ultimate gentleman", most likely. Can also be short for simpleton if you're a boomer.
Thing Thing: "have you heard of that simp who donated 60k to pokimane? damn."
Thong Thong: "what the fuck, that's a hell of a simp!"
An individual who prefers the musical stylings and contributions to the Grateful Dead of Keith Godchaux over Brent Mydland
Hetty friend #1: "I was literally just vibin to some mini moog tone on an unstoppable '81 Alabama Getaway when this shoebee asked if I could put on some Europe '72 instead"
Hetty friend #2: "What a friggin simp"
Sucker Idolizing Mediocre Pussy
"Oh my god she said my name"
"What a fucking Simp that guy is"