'To take up cudgels for' definitions:

Definition of 'To take up cudgels for'

From: GCIDE

Cudgel \Cudg"el\ (k?j"?l), n. [OE. kuggel; cf. G. keule club (with a round end), kugel ball, or perh. W. cogyl cudgel, or D. cudse, kuds, cudgel.] A staff used in cudgel play, shorter than the quarterstaff, and wielded with one hand; hence, any heavy stick used as a weapon. [1913 Webster]
He getteth him a grievous crabtree cudgel and . . . falls to rating of them as if they were dogs. --Bunyan. [1913 Webster]
Cudgel play, a fight or sportive contest with cudgels.
To cross the cudgels, to forbear or give up the contest; -- a phrase borrowed from the practice of cudgel players, who lay one cudgel over another when the contest is ended.
To take up cudgels for, to engage in a contest in behalf of (some one or something). [1913 Webster]