1. [late 16C–1900s] the vagina.
2. [17C–mid-19C] (also ace of spades) the penis.
3. from the high value of the card.
(a) [late 19C+] (orig. US) an important, influential person; someone of high quality or held in high esteem; an outstanding person.
(b) [late 19C+] (orig. Aus.) an expert.
(c) [1910s+] something useful, important.
(d) [1940s+] (US black) a very close friend.
(e) [1940s+] (US) a detective.
(f) [1950s+] a term of (intimate) address.
(g) [1960s] (US campus) used sarcastically, a fool, a clumsy person.
(h) [1960s+] (US campus) the grade of A.
(i) [1970s] a professional killer.
4. as a single unit.
(a) [late 19C+] (US) $1; $1’s worth.
(b) [1910s] (US) a single example.
(c) [1920s+] (US Und.) a one-year jail sentence.
(d) [1950s–60s] (UK Und.) £1.
(e) [1960s] (US gambling) the one-spot on a die.
5. in drug contexts.
(a) [1930s+] (US drugs) marijuana, a marijuana cigarette.
(b) [1970s+] (US drugs) phencyclidine (PCP), a dangerous hallucinogenic based on animal (pig) tranquillizer.
(c) [1970s+] (US drugs) one single pill of amphetamine, barbiturate or tranquillizer.
(d) [2000s] (US prison) a puff on a cigarette.
[1920s–60s] (US) a $1 bill.
[1910s–20s] (US) a $1 bill.
[20C+] (orig. US) a hidden asset.
see black ace
[early 17C] the vagina.
1. [19C+] a widow [the widow’s clothes].
2. [late 19C+] the female genital area [a fig. ‘black hole’].
3. [1940s+] a black person; sometime derog. but usu. used by blacks themselves to designate a friend, a loyal trustworthy person [spade n.].
4. [2000s] (also ace of arse) the area of dark skin around the anus.
[early 18C] the female genital area.
[late 19C+] (orig. US) a hidden advantage, not to be revealed until a suitable moment.
[mid-17C] the female genital area.
[1990s+] to produce a clean sheet of toilet paper, having wiped one’s anus thoroughly.
[late 19C+] (US) to be in total control.
[20C+] (Aus./N.Z./S.Afr.) on one’s own.
the female genital area.
[1920s] (US Und.) a card in a crooked deck.
[1900s] (US) to be held in the highest esteem by someone (cf. stand ace-high under ace-high adj.).
[19C] the vagina.