Synonyms to off the wall

absurd, Pickwickian, a bit thick, a bit thin, abnormal, amusing, anomalous, asinine, balmy, barred, beyond belief, bizarre, childish, closed-out, cockamamie, comic, contrary to reason, crazy, curious, daft, disproportionate, doubtable, doubtful, droll, dubious, dubitable, eccentric, empty, excluded, extravagant, fantastic, farcical, fatuitous, fatuous, foolish, freaked out, freaky, funny, futile, grotesque, hard of belief, hard to believe, harebrained, high-flown, hilarious, hollow, hopeless, humorous, idiotic, idle, illogical, imbecile, imbecilic, implausible, impossible, inane, incoherent, incommensurable, incommensurate, incompatible, inconceivable, incongruous, inconsequent, inconsistent, inconsonant, incredible, insane, irrational, irreconcilable, kooky, laughable, logically impossible, loony, ludicrous, mad, meaningless, monstrous, moronic, nonsensical, not deserving belief, not possible, nuts, nutty, odd, oddball, off, open to doubt, open to suspicion, out, out of proportion, outlandish, outrageous, outre, oxymoronic, paradoxical, passing belief, passing strange, peculiar, poppycockish