ridiculous
adjective
inspiring scornful pity
“how silly an ardent and unsuccessful wooer can be especially if he is getting on in years”
so unreasonable as to invite derision
“the absurd excuse that the dog ate his homework”
“that's a cockeyed idea”
broadly or extravagantly humorous; resembling farce
“the wild farcical exuberance of a clown”
“ludicrous green hair”
Source: WordNet 3.1, Princeton University