also butt-hole, "anus," 1950s slang, from butt (n.6) + hole (n.). Earlier it meant "blind hole; cul-de-sac" (early 20c.).
Entries linking to butthole
butt n.6
"posterior, buttocks, rump," from mid-15c. in cookery, in reference to animal parts, probably from or related to butt (n.1) "thick end," or short for buttock. In modern use chiefly of humans, probably an independent derivation, attested by c. 1860 in U.S. slang.
hole n.
Old English hol (adj.) "hollow, concave;" as a noun, "hollow place; cave; orifice; perforation," from Proto-Germanic *hulan (source also of Old Saxon, Old Frisian, Old High German hol, Middle Dutch hool, Old Norse holr, German hohl "hollow," Gothic us-hulon "to hollow out"), from PIE root *kel- (1) "to cover, conceal, save." As an adjective, it has been displaced by hollow, which in Old English was only a noun, meaning "excavated habitation of certain wild animals."
As a contemptuous word for "small dingy lodging or abode" it is attested from 1610s. Meaning "a fix, scrape, mess" is from 1760. Obscene slang use for "vulva" is implied from mid-14c. Golfing hole-in-one is from 1914; as a verbal phrase from 1913. To need (something) like a hole in the head, applied to something useless or detrimental, first recorded 1944 in entertainment publications, probably a translation of a Yiddish expression such as ich darf es vi a loch in kop.