rag week

from Wiktionary, Creative Commons Attribution/Share-Alike License

• n. An annual event in many (mainly British) universities where students engage in unusual activities to raise money for charity.
• n. The days of the month when a woman has her period.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• n. a week at British universities during which side-shows and processions of floats are organized to raise money for charities