The gecko is a sexual act between two people or more (if that’s what your into) where the thumb is inserted into the anus of the other player and that person is made to climb up a wall in the motion of the cold blooded reptile known as a gecko.
Hey guys, the coolest thing happened! Me and my dog did the gecko last night!!! He claimed sooo far up the wall!
by Geckotips101 October 14, 2020
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A nickname for a shirt with a contrasting collar and cuffs, usually a blue shirt with white collar and white cuffs. Lee Iacocca started this fashion trend back in the 80's. This nickname developed as a result of the character Gordan Gecko wearing these types of shirt in the movie Wall Street. These shirts seem to phase in and out of style every few years.
Everyone has a Gecko in the back of their closet.
by Mr. Moo Bovine August 20, 2007
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the most superior organism on earth
i wish i was a gecko
by Troy December 6, 2003
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The assistant principal likes to show all the students his gecko. He get's them out of his office in 15 mins or less.
by rentj May 27, 2014
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Awesome lil’ badasses that lick their eyeballs and can regrow their tails
Geckos are pretty cool
by GeckoDude568 January 29, 2019
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An alternative to "get-go" that is often used by illiterate mexicans.
"that is something you have failed to do from the gecko"

"you have denied us the raw footage that we have requested from the gecko"
by wiggybop June 6, 2016
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A Person Who Is Extremely Good At Scaling Urban Buildings, Or Natural Rock Formations. These People Are Usually Experienced Rock Climbers, Or Involved In Parkour. These People Are Categorized By Their Large Amounts Of Energy.

Can Also Be Used To Describe A Group Of These People, Called Geckos Or Gecko When Describing An Individual Person
Gecko:

Guy 1:Wow, Dude Gecko Here Just Jumped Over My SUV, Damm

Guy 2: Dude Now Hes Running Up The Fire Escape, Look At Him Go!.

Geckos: Dude I Was Hanging With These Guy Who Were Doing Parkour, A Bunch Of Fucking Geckos, Dammmm

EX:A Rock Climbing Expedition
by Psyris February 11, 2010
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