muddy taxi Posted in M Best definition muddy taxi A muddy taxi refers to the act of taking a shit in a taxi, usually after a night of drinking. Jenny was wasted last night but I can’t believe she pulled a muddy taxi on the way home from taco bell. How satisfied are you with the definition? Looking for muddy taxi meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 50 times.