Same word as daft:

absurd,asinine, bedlamite,bonkers, cracked, crackers, daffy,demented,deranged, dopey,flaky,foolish, fried,giddy, half-baked,idiotic, in the ozone,inane,insane,lunatic,mad,mental, nuts, nutty, off the wall, out of one's gourd,ridiculous, screwy,silly,simpl