1. n. A spoiled child. Literally, a child raised by its grandmother; hence, spoiled. [from Greek mamma "grandmother "+ threptos "nourished, reared"].
2. n. Microsoft. See e.g. NY Times, Judge Accepts Most of Proposed Settlement in Microsoft Case, Nov. 1, 2002:
"A federal judge Friday approved an antitrust settlement that will essentially prevent Microsoft from acting like a corporate mammothrept when it doesn't get its way. The agreement, signed off on by both the Justice Department and the software giant..."
3. n. My two-year old son. "Mine, mine, mine, mine, mine!" See 1.