1. in context of pleasure, advantage [orig. sporting jargon real jam, anything exceptionally good].
(a) [mid-19C+] profit, an advantage.
(b) [mid-19C+] something very enjoyable.
(c) [mid-19C+] anything easy.
2. [late 19C+] (Aus.) images of excessive ‘sweetness’.
(a) affectation, pretentiousness; thus show jam, to act in an affected manner.
3. [1920s–40s] (US Und., also jamb) small stolen articles, i.e. personal jewellery.
4. bodily fluids.
(a) [1940s+] (US gay) faeces; often in the context of homosexual foreplay.
(b) [1960s+] menstrual blood.
(c) [1960s+] (US black) semen.
(d) [2000s] vaginal secretions.
[1940s+] a homosexual with no other sexual interests.
[1960s+] a tampon, a sanitary towel.
[1940s+] (US gay) to lick the anus.
[1980s] (US black) to have sexual intercourse.
[2000s] to ejaculate.
1. [late 19C–1900s] to put on airs.
2. [1900s] to flatter.
[mid-19C–1910s] of objects or people, the best, the superlative.
SE in slang uses
see separate entry.
[1980s+] a police car.
[2000s] (Irish) wishful thinking.
[1930s] (Aus. tramp) the lowest rank of itinerant, eating/cooking out of jam-tins.