look up any word, like wcw:
 
1.
a flood that, once it happens, won't happen for another 100 years, unless theres a 500 year flood 15 years later
Able: I thought '93 was the 100 year flood!
Mable: You thought. But this one is a 500 year flood.
by iowa13 June 14, 2008

Words related to 100 year flood

100 500 flood plain year