blackhole = moron
noun
a stupid person
fool, idiot, ass, blockhead, dunce, dolt, ignoramus, imbecile, cretin, dullard, simpleton, clod, nitwit, halfwit, dope,chump, dimwit, dingbat, dipstick, goober, coot, goon, dumbo, dummy, ditz, fathead, numbskull, airhead, butthead....