Green’s Dictionary of Slang

akimbo v.

[for ety. see akimbo adj.]

(US black/Southern) to saunter, esp. with one’s hands in pockets or on the hips.

(ref. to 1946) Brewer Dog Ghosts 55: ‘Well,’ ’low [i.e. allowed] Myra, akimboin’ fo’ Willie Word [etc.] [DARE].