Yank speak for an exhaust manifold - the series of pipes which allow the exhaust gasses to pass from the cylinder to the catalytic converter
Yo, my new header got me another 10 BHP
by Redwitch December 17, 2006
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The act of drilling a hole into a person's head and fucking his/her brain matter.
Yo, Kylie pissed me off so I pulled a header on her.
by zuba February 3, 2005
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A Nutter or crazy person, often violent. Shortened version of Head the Ball
Don't go near him, he's a complete header, i once saw him pick a fight with his own reflection
by Leoni December 11, 2007
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When a sophisticated gentleman attempts a charging back post bullet header behind a fellow of the opposite sex, he then proceeds to fucking body her
Person 1 - "Back post!"
Person 2 - "My header!"

Alan Partridge - "TWAT! Did you see that?!"
by Hedd Wyn December 1, 2021
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Chase: I was scoring goals with Messi and scoring with Rachel yesterday...

Austin: "Header!"
by bishfish101 November 9, 2011
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To receive a blow-job; having a person suck one's penis til it unloads.
I was so drunk last night I let that ugly fat bitch Myriam give me a header.
by venusflytrap January 18, 2005
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a girl who gets with bare mans gives them head
that paris conners girl give me headers
that girls a headers
by shawtygotbackz July 15, 2019
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