Source : Webster's Revised Unabridged Dictionary (1913)

Akimbo \A*kim"bo\, a. [Etymology unknown. Cf. {Kimbo}.]
   With a crook or bend; with the hand on the hip and elbow
   turned outward. ``With one arm akimbo.'' --Irving.

Source : WordNet®

akimbo
     adj : (used of arms and legs) bent outward with the joint away
           from the body; "a tailor sitting with legs akimbo";
           "stood with arms akimbo" [syn: {akimbo(ip)}]
     adv : with hands on hips and elbows extending outward; "she stood
           there akimbo"