A phrase that is most commonly used while or before the use of marijuana. P.M.A.B is an acronism for Pack Me A Bowl. It thus entails word play that uses the letters PMAB...see examples..
Pardon Mister Albert Berstien
Pussy Makes Asians Blind Punt Midgets Across Bangkok
Pilgrams Make Assholes Bleed
People Martyr Assinine Bitches Pamela's marvelous at blowing