Green’s Dictionary of Slang

1. (US black) to inform, to explain.

1928		Blind Blake ‘Backdoor Slam Blues’ 🎵 Nobody knows how sad and blue I am / Ah, boot it, Mr Blake, boot it — I say nobody knows how sad and blue I am.
1944		D. Burley Orig. Hbk of Harlem Jive 15: Let me boot you to my play.
1958		Hughes & Bontemps Book of Negro Folklore 481: boot : To explain, to describe, inform authoratively. That chick booted me about love.
1960, 1975		Wentworth & Flexner DAS.

2. (US black) to introduce.

1944		D. Burley Orig. Hbk of Harlem Jive 68: I ‘boot’ you to a stranger, means I introduce you to someone.
1960, 1975		Wentworth & Flexner DAS.

3. (US) to disparage, to criticize.

1960, 1975

Wentworth & Flexner DAS.