grave-bait, n. — Green’s Dictionary of Slang

grave-bait n.

[pun on jailbait n. (1) although this woman is likely to get one killed, rather than sent to jail]

a young woman, flirtatious and sexy, but linked to a powerful and dangerous man.

1946

Mezzrow & Wolfe Really the Blues 178: The moment the music stopped this grave-bait ran pouting to her daddy.