A fagcel is an incel who is homosexual.
The word combines the homophobic slur, faggot or fag with incel.
"Dude have you seen the shit Nathan posts?"
"Yeah man he's a total fagcel"
"Have you seen the shit Nate posts?"
"Yeah that dude's a total fagcel"
Sticker hunting means you go out and look for stickers, either to take pictures of or to remove.
I'm going sticker hunting later, wanna come with?