from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The last of a series of annoyances or disappointments that leads one to a final loss of patience, temper, trust, or hope.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A small addition to a burden which causes it to exceed the capacity.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the final irritation that stretches your patience beyond the limit
From the proverb "It's the last straw that breaks the camel's back”.(American Heritage® Dictionary of the English Language, Fourth Edition)
Ellipsis of the straw that broke the camel's back. (Wiktionary)