An overly friendly portly lady of advanced years. Often to be found lurking in the men's toilets of Londons pubs. A Ben's Mum will pounce and attack unsuspecting men, her large hammy arms providing the power and momentum needed to coax erections out of those in advanced drunken states. The rolls of flab surrounding her uncovered mid section are often brimming with male ejaculate.
Bloody ell, I got jumped by a right Ben's Mum back there. Had to harpoon the slutty behemoth.