In the act of a blowjob, the giver inserts their thumb into the receivers anus. This is done in a classical hitchhiker motion.
My girl was giving me a Crusty Hitchhiker. When she was she held up thumb and I said “that’s doo doo baby!”
by DoctorRicklez March 25, 2021
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when doing a girl make a pop noise and then stick your thumb up her ass.
by peter E August 27, 2003
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A) A right overhanded handjob given by a passenger in an automobile.
Sally's left wrist was sprained so she gave me a reverse hitchhiker on the drive home.
by DudemanAric February 8, 2012
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When you finger (preferably with your thumb) a girl in the asshole while she's driving and you are in the passengers seat.
I bet Finch gave Stifler's mom a nasty Hitchhiker's Thumb on the way back from that cabin in American Pie 2.
by DragonSlayer45 February 18, 2011
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Using one's underwear to wipe their behind in the absence of toilet paper.
That hike took a lot longer than I thought it would. I had to use the old Hitchhiker's Handkerchief and now I need new underwear.
by Stzar November 13, 2019
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1: A book.

Not only is it a wholly remarkable book, it is also a highly successful one- more popular than the Celestial Home Care Omnibus, better selling than Fifty-Three More Things to Do in Zero Gravity, and more controversial than Oolon Colluphid's trilogy of philospophical blockbusters, Where God Went Wrong, Some More of God's Greatest Mistakes, and Who Is This God Person Anyway?

In many of the more relaxed civilizations on the Outer Eastern Rim of the Galaxy, the Hitchhiker's Guide has already supplanted the great Encyclopedia Galatica as the standard repository of all knowledge and wisdom, for though it has many omissions and contains much that is apocryhal, or at least wildly inaccurate, it scores over the older, more pedestrian work in two important respects.

First, it is slightly cheaper; and second, it has the words Don't Panic inscribed in large friendly letters on its cover.

2: Also a book, written by Douglas Adams, which centers on the book that the book takes its name from. Not to say that the book deals entirely with the book, but that the book is, in the book, a central part. Of the book, that is.
by Vee Are Are Schee March 29, 2004
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