Green’s Dictionary of Slang

buns n.

[joc. resemblance to the foodstuffs]

1. [20C+] the buttocks; occas. in sing.

2. [1950s+] a woman’s breasts.

3. [1980s+] fig. one’s body.

In compounds

bun boy (n.)

[1950s+] a homosexual.

bun merchant (n.) [merchant n.]

[1960s] (US gay) a male prostitute specializing in taking a passive role.

bun-spread (n.)

[2000s] (US prison) an anal search.

In phrases

bun up (n.)

[1980s+] (Aus. prison) homosexual gang rape.

burn some buns (v.)

[1970s+] (US gay) to engage in vigorous sex.

hot buns (n.) [hot adj. (1c)]

[1970s] (US prison) a prison homosexual .

split some buns (v.)

[1970s+] (US gay) to have anal intercourse.

strut one’s buns (v.)

[1970s] (US gay) to walk in an exaggerated way, intended to focus attention on one’s tight buttocks.

In exclamations

my buns!

[late 17C+] a general excl. of disdain, dismissal, arrogant contempt.