(Abbreviation) Little Miss Taco Muncher
A person(usually a girl) who is viewed as a mooch or leach that hangs around someone's house and eats their food, uses their shower, deuces in their bathroom and pays no rent. This person is generally dating a roommate and is thus an additional, unwanted roommate. They are also often of hispanic descent.
Yo, the toilet is clogged again and there is chicken wing sauce on the couch; was L.M.T.M. here lastnight?