Yours, Etc.: Origins and Uses of 8 Sign-Offs
"shaky, groggy, unstable," 1919, of unknown origin. Cf. German prefix wankel-, which has a similar sense. Or perhaps from surviving dialectal words based on Old English wancol "shaky, tottering" (see wench).
[fr British dialect wanky or wankle, ''weak, unsteady''; perhaps related to wanky, ''spurious, doubtful,'' said of coins and attested by 1913]
Tedious and serious, esp anxious and over-studious in an academic situation: ''Jenny Cavilleri,'' answered Ray. ''Wonky music type''/ a class which I have long dismissed as hopelessly wonky
[1970s+ Students; fr wonk]