Green’s Dictionary of Slang

last adj.

SE in slang uses

In compounds

last heartbeat (n.) [? an exaggerated phr. of love; ‘I will love you until my last heartbeat’]

(US black) a lover, a sweetheart.

[US]Pittsburgh Courier (PA) 22 Aug. 7/6: My last heart beat — (my sweetheart).
[US]M.H. Boulware Jive and Sl.
last mile (n.)

(US prison) the final walk of a condemned man from death row to the execution chamber; also attrib.

[US]L.E. Lawes Twenty Thousand Years in Sing Sing 316: She trod the ‘last mile’ bravely, if not with dignity.
[US]L.L. Stanley Men at Their Worst 46: I firmly believe that the protracted ‘last mile’ walk for condemned men is the worst form of torture that can be applied to them.
[US] ‘Death Row’ in D. Wepman et al. Life (1976) 118: Those are memories from long before my trial, / And now it’s time to walk that last mile.
[UK]J. Morton Lowspeak.
last waltz (n.)

(US prison) a condemned man’s final walk to the execution chamber.

[US]G. Milburn ‘Convicts’ Jargon’ in AS VI:6 439: Last Waltz, n. The final walk of a condemned man; the walk from the death house.
[US]Mencken Amer. Lang. (4th edn) 581: In virtually all American prisons [...] The march to the electric-chair is the last waltz.
[US]Monteleone Criminal Sl. (rev. edn).
[US]Goldin et al. DAUL 122/1: Last waltz, the. The march of the condemned man to gallows, chair, gas chamber, or other place of execution.
[US]Bentley & Corbett Prison Sl. 105: Last Waltz A condemned prisoner’s walk from the death cell to the execution chamber.

In phrases