Boston Rocket
To draw or make an object into the shape of a Penis (don't forget the balls).
Nick has drawn a big Penis on Adam's note pad. Oh look says Tristan it's a 'Boston Rocket'.
Boston Fnog Rocket
a sort of fnog/boston steamer hybrid where a male shits over his lovers chest then smears it over her vagina with his arse, he then proceeds to give oral sex after which he then inserts his penis hard and fast, like a rocket as it were.
'i gave your wife a boston fnog rocket last night.'