Green’s Dictionary of Slang

boost v.4

[ext. of boost v.1 ]

(US campus) to seduce, to have sexual intercourse with.

[[US]E.E. Landy Underground Dict. (1972) 38: boost [...] Prostitute oneself (a female) for money to buy narcotics].
[US] P. Munro Sl. U.
[US]K. Kainulainen ‘University Euphemisms in Calif. Today’ 🌐 A great number of expressions are used instead of the expression ‘to have sex’, which has probably lost its power to shock, for example ‘to ride the hobby horse’, ‘to make someone scream’, ‘to do the wild thing’, ‘to boost’, ‘to boink’, ‘to ball’ or ‘to bump’ to name a few.