From Wiktionary, the free dictionary
From mega- + debt.
megadebt (countable and uncountable, plural megadebts)
- An enormous debt
1995 December 27, Debra Saunders, “Clinton, not GOP, deserves public's scorn”, in Milwaukee Journal-Sentinel[1]:For a nation that values its children, folks are awfully complacent about saddling their kids with megadebt.
