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A Henderson is someone that possesses insane amounts of car knowledge and uses it to effectively to drop knowledge-bombs during civil conversations about cars.
Friend 1: "Wow look at those two turbos in that Subaru!"

Friend 2: "Those are hella horns, not turbos, you moron! Wow man..."
Friend 3: "Wow man, you just got Henderson'd!"
by Ghalby February 14, 2017
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The surname Henderson is of Scottish origin and means "son of Henry". The name is derived from the Scots Gaelic clan MacEanruig of Glencoe which was later anglified to Henderson and McKendrick. Other areas of Scotland that the name made an early appearance were Caithness in the far north of Scotland in the 15th century, where Henry Gunn fell out with other members of the clan Gunn and adopted the name Henderson. Towards the end of the 16th century the name appears around Dumfries in the Scottish borders when the family are accused of being Border Reivers. The name was unknown in England prior to the 17th century and is first mentioned in a marriage document between one of the Borders Hendersons and the daughter of a Carlisle merchant at Hexham

also one of the best surnames ever!
name. Mr Henderson
by ace_maan May 19, 2009
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The act of putting one's testicle into the anus of another. Usually done in multiple attempts.
Doug pulled a henderson on Rebbecca and now can no longer have children.
by nuggetlover February 17, 2009
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noun.
1. the act of falling wildly in love with a female and professing this to her passionately, and losing interest within a week.

other forms: henderson-ed, henderson-ing, henderson-able
"i got totally henderson-ed last weekend man, i so did not even see it coming!" or "he definately henderson-ed her to the extreme, bro."
by linnea rosie October 04, 2007
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A two-handed masturbation technique performed whilst viewing a poor quality video of a naked, jumproping woman. A popular variation involves the concurrent playing of the theme song for Rocky (the original).
With only a few minutes before the Raiders game, Harley had just enough time to complete a Henderson.
by Scamp Bellcott October 19, 2007
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A henderson is a guy with dwarf-like features
Kevin: That guy's not too short, but looks weirdly short and has a strange build

Harry: yeah true kev, he's a right henderson!
by Waqas Dastigir November 27, 2011
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When you're driving in a car with a group of friends, and the driver crashes into something random and you almost get injured. After that happens, you scold the driver and hold on for dear life as he continues to drive.
(Driving down the road and your friend hits and wrecks into a random object)

"Oh my gosh Timmy! You totally just pulled a Henderson!"
"Don't drive with Timmy, he will totally pull a Henderson!"
by iflifeisreallylikethis52 January 18, 2010
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