Green’s Dictionary of Slang

nard n.

[ety. unknown; 20C use var. on nerd n. but note nards n.]

(US) an obnoxious person.

Show quotations
[UK]‘Ducange Anglicus’ Vulgar Tongue (2nd edn) 23: Nard n. A person who obtains information under seal of confidence, and afterwards breaks faith.
[US]Poston ‘Problems in the Study of Campus Sl.’ in AS XXXIX:2 119: From Baltimore comes an equally mysterious personal designation, imbine; from the Iowa City campus, nard.