noun

silly or foolish behaviour.

we endured his foolery all afternoon

clowning,fooling,tomfoolery,hoaxing,mischief,buffoonery,silliness,silly behaviour,skylarking,horseplay,antics,capers,practical jokes,pranks,foolishness,stupidity,idiocy,larking around,larks,shenanigans,monkey tricks,didoes,harlequinade