Crank (kr?nk), a. [AS. cranc weak; akin to Icel. krangr, D. & G. krank sick, weak (cf. D. krengen to careen). Cf. Crank, n.] 1. Sick; infirm.
2. (Naut.) Liable to careen or be overset, as a ship when she is too narrow, or has not sufficient ballast, or is loaded too high, to carry full sail.
3. Full of spirit; brisk; lively; sprightly; overconfident; opinionated.
He who was, a little before, bedrid,... was now crank and lusty.
Udall.
If you strong electioners did not think you were among the elect, you would not be so crank about it.
Mrs. Stowe.