A SmellyNoob is a person who typically acts very dumb, with very stupid decisions. Nobody wants to be a SmellyNoob, but those who deny being one tend to be a SmellyNoob.
Someone who wants to be apart of a group but always stands to the the side, claiming to stay out of someones way. Too quite or afraid to step forward and speak their opinion.
Dude, why is your girlfriendalways being a shellmonster whenever we are all hanging out?