from
Jargon File (4.4.4, 14 Aug 2003)
choad
/chohd/, n.
Synonym for `penis' used in alt.tasteless and popularized by the
denizens thereof. They say: "We think maybe it's from Middle English
but we're all too damned lazy to check the OED." [I'm not. It isn't.
--ESR] This term is alleged to have been inherited through 1960s
underground comics, and to have been recently sighted in the Beavis
and Butthead cartoons. Speakers of the Hindi, Bengali and Gujarati
languages have confirmed that `choad' is in fact an Indian vernacular
word equivalent to `fuck'; it is therefore likely to have entered
English slang via the British Raj.