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The Collaborative International Dictionary

blowby

blowby \blow"by`\, blow-by \blow"-by`\(bl[=o]"b[imac]`), n. the leakage of gases from the combustion cylinder of an internal combustion engine between the piston and cylinder wall into the crankcase.

Wiktionary

blowby

n. (alternative spelling of blow-by English)

Usage examples of "blowby".

The power to destroy the laird of Dalkeith with one blowby taking his cherished wife away from him.