Dweeb

google

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1980s: perhaps a blend of dwarf and early 20th-century feeb ‘a feeble-minded person’ (from feeble).

wiktionary

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From 1968 US college slang, probably related to feeb. [1]

etymonline

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dweeb (n.)

1968, U.S. college student slang, probably a variant of feeb "feeble or feeble-minded person."