Top Definition
1) Someone who's IQ is below sea level.
2) Someone so ignorant, stupid, annoying, or lame that they are drowning in their own stupidity.
3) The very bottom of the food chain, below pond scum.
"Oh my god, Joe is such a scuba noob!"
"That's retarded; Don't be a scuba noob."
by Chaosmastermind December 12, 2007
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