Chuffins are gifts you give to people you don't like, sort of like death cookies and poison-berry muffins.
UserNameWithNumbers2517: ur such a fag man go eat some chuffins
ChUfFiNeAtEr: ThAnKs DuDe!111111
This occurs when, for whatever reason, you are giving someone oral sex and you miss and go up there nose. Usually followed by a shlanoinker.
Yeah, my mouth raping turned into a weiner sniff. I still can't smell anything.