Wiktionary
tit wank
n. (context vulgar slang English) A sexual act and form of masturbation where the penis is between the female's breasts and rubbed.
Usage examples of "tit wank".
Then there was an armpit wank for the bank manager, another soapy tit wank for the baker, hand jobs for innumerable old campasinos and ten thousand pesetas from the priest to let him watch her taking a piss in the orange groves.