Any fail/mistake in general, especially grammatical/spelling errors. Can be used as a noun, verb, adjective, etc. A multipurpose word
It's also expected that one or many people yell "Snuss!" at the offender.
Bro 1: "Dude! I things last night!"
Bro 2: "Snuss! You left out the "did" dude"
Bro 1: "Damn it I snussed hardcore."
Someone who has a COMPLETELY different personality over the phone/texts than in person. It is ridiculously annoying and a douche move. They pathologically lie and brag about how great their life is and leave "uncool" friends behind.
First Dude: "God DAMN it dude he is SUCH a virtual louis, he's really snazz in person but a complete dick in the group chat."
Second Dude: "I know he lied about banging all of those girls and getting wasted on coke over the phone. Then he still acted like that was no big deal when we saw him in person."