knowing stuff (adjective) experienced: knowledgeable, knowing
Sinonime: absurd,
balmy, beyond all reason,
bizarre, cockeyed, derisory,
eccentric,
fatuous, foolhardy, foolish,
goofy*, half-baked, harebrained,
idiotic, ill-conceived, impracticable, imprudent,
inane,
inappropriate,
insane,
irresponsible, loony,
ludicrous,
nonsensical,
odd, out of all reason,
outrageous,
peculiar,
preposterous,
puerile,
quixotic,
ridiculous,
senseless, short-sighted,
silly,
strange, unworkable,
weird,
wildAntonime: believeable,
realistic,
reasonable,
sensible