Derived from the phallic appearance of the yellow tubes carrying riders pulled by a boat that look like giant bananas. Thus a banana boat ride can be a euphemism for sex. Ergo, slang for sex with a Mexican man, usually associated with a tourist in Mexico having sex with a local man on vacation
While on vacation in Mexico, James invited Ricardo back to his hotel room for a Mexican banana boat ride.
by napajoe December 6, 2017