Mex-pack Posted in M Best definition Mex-pack Latinos traveling in a group of three or more.A very common sight in L.A. I couldn’t get to the taco truck,as there was a huge Mex-pack in the way. How satisfied are you with the definition? Looking for Mex-pack meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 69 times.