Shenanigans

Can anyone throw some light on the origin of the above? Someone has suggested it is a derivation of arabic and means 'to play the fox'.

Here are a few more theories:

SHENANIGAN - "n. 1855, of uncertain origin. Spanish 'chanada' (a shortened form of 'charranada') trick or deceit, is a possible source, or less likely, German peddler's argo 'Schenigelei' work, craft, or the German slang verb 'schinaglen' to toil." From The Barnhart Concise Dictionary of Etymology by Robert K. Barnhart (HarperCollins Publishers, New York, 1995).