n. an earnest student. (Collegiate.) : Don't call Bob a dweeb! Even if he is one.
n. a strange or eccentric person; a nerd. : This place is filled with dweebs of all sizes.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Word Origin & History
dweeb
1968, U.S. college student slang, probably a variant of feeb "feeble person."