Batty

Adjective

 * 1)  Mad, crazy, silly.

Noun

 * 1)  The buttocks or anus.

Derived terms

 * batty boy
 * batty man
 * batty rider

Thesaurus
apish, asinine, balmy, bananas, barmy, bats, beany, bedlamite, befooled, beguiled, besotted, bonkers, brainless, buffoonish, buggy, bughouse, bugs, cockeyed, cracked, crackers, crazed, crazy, credulous, cuckoo, daffy, daft, dazed, deranged, dippy, dizzy, doting, dotty, dumb, fatuitous, flipped, fond, fool, foolheaded, foolish, freaked-out, fruitcakey, fruity, fuddled, futile, gaga, goofy, gulled, haywire, idiotic, imbecile, inane, inept, infatuated, insane, just plain nuts, kooky, loony, loopy, mad, maniac, maudlin, moronic, nuts, nutty, off the hinges, off the track, off the wall, potty, round the bend, sappy, screwball, screwballs, screwy, senseless, sentimental, silly, slaphappy, stupid, thoughtless, wacky, wet, witless