tomfoolery n 1: foolish or senseless behavior [syn: {folly}, {foolery}, {tomfoolery}, {craziness}, {lunacy}, {indulgence}]
Tomfoolery \Tom`fool"er*y\, n. Trifling or silly behavior done mostly for amusement; foolishness; fooling around. Syn: tomfoolishness. [1913 Webster]
26 Moby Thesaurus words for "tomfoolery": antic, balderdash, baloney, banter, blatherskite, buffoonery, caper, claptrap, clownishness, foolery, fooling, frolic, harlequinade, hogwash, horseplay, lark, malarkey, monkeyshine, monkeyshines, poppycock, rubbish, shenanigan, shenanigans, shines, trick, twaddle