blowoff

blowoff
/bloh"awf', -of'/, n.
1. a current of escaping surplus steam, water, etc.: The safety valve released a violent blowoff from the furnace.
2. a device that permits and channels such a current.
3. Slang. a person who brags or boasts; a blow-hard.
4. a temporary, sudden surge, as in prices: The Federal Reserve Board's credit tightening could cause a blowoff in interest rates.
[1830-40; n. use of v. phrase blow off]

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