Green’s Dictionary of Slang

brisket n.1

[SE brisket, the breast of an animal]

1. [early 19C+] (also briskit) the human chest.

2. [20C+] in pl., the female breasts.

3. [1950s+] the penis, in phrs. below.

In derivatives

brisketer (n.)

[early 19C] a blow to the chest.

In compounds

brisket-beater (n.) [sense 1 above + SE beater]

[late 18C–mid-19C] a Roman Catholic.

brisket beef (n.)

[late 17C] the penis.

brisket-cut (n.) [SE cut, a blow]

[early 19C] a blow to the chest.

In phrases

bare-brisket (n.) [SE bare]

[19C–1900s] a thin person.

bury the brisket (v.)

[1950s+] (US) of a man, to have sexual intercourse.

fuck a brisket (v.)

[1960s] of a man, to have intercourse by rubbing his penis between the woman’s breasts.