Where does “geek” come from?

Geek comes from Dutch gek, from Middle Dutch geck, though the original meaning is uncertain.

geek (English): A carnival performer specializing in bizarre and...

Definitions

Step	Language	Word	Meaning
1	English	geck	scorn; derision; contempt; Fool; idiot; imbecile;...
2	Dutch	gek	crazy, mad; ludicrous, farcical; silly, playful
3	Middle Dutch	geck	madman

geek — Etymology, Origin & Word History | Etymology Explorer