daft
1 absurd, asinine, crackpot (informal) crazy, doolally (slang) dopey (informal) foolish, giddy, gonzo (slang) goofy (informal) idiotic, inane, loopy (informal) off one's head (informal) off one's trolley (slang) out to lunch (informal) scatty (Brit. informal) silly, simple, stupid, up the pole (informal) wacko or whacko (slang) witless
2 barking (slang) barking mad (slang) crackers (Brit. slang) crazy, demented, deranged, insane, lunatic, mental (slang) not right in the head, not the full shilling (informal) nuts (slang) nutty (slang) round the bend (Brit. slang) touched, unhinged
3 (with)
besotted by, crazy (informal) doting, dotty (slang, chiefly Brit.) infatuated by, mad, nuts (slang) nutty (informal) potty (Brit. informal) sweet on