The Collaborative International Dictionary of English v.0.48:
Mam \Mam\ (m[a^]m), n. [Abbrev. fr. mamma.] Mamma. [1913 Webster]WordNet (r) 3.0 (2006):
Mam n 1: a member of a Mayan people of southwestern Guatemala 2: a Mayan language spoken by the Mam