Something someone does when they start to make annoying sounds or singing weirdly. And then when people ask them to stop, they say sorry and say they'll stop.. Then continue without realizing that they started again.
Person 1: Doododooodooooooooooo!
Person 2: Dude, shut up!
Person 1: Oh, sorry.. I'll stop.
Person 2: Kay, thanks.
Person 1. Doododooodooooooooooo!
Person 2: OMG STOP PULLING A LOGAN!
by Gangsta?IThinkSo. April 07, 2010
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a LOgan is a severly mentaly retarded type of water lizard which swims around in circles to lure in predaters while making a high pitched scream.
yo did you just see that LOgan et demolished over there!
by the Jakesta April 28, 2010
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An eponym: the SI unit for measuring penis (1 Logan= pi inches of penis). The original Logan was a member of the Harvard Glee Club sometime in the mid-90s.
The average erect male penis measures 2 Logans in length and 1/2 Logan in diameter.

I am soft-packing for that coveted 3-Logan look.

by tiler222 May 12, 2006
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A large white mammal built like a brick-shit-house can also be called a Grock or Grot. It is found mainly in the UK around Manchester, where it roams the streets (approach with extreme caution and be equipped with tranquilizers).
Oh look theres Logan, Shit RUN! Arghhhh.....
by Jace *True Brit* February 18, 2006
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An uptight boy who usually looks younger than most his age. They are typically left-handed.
Person A: "Is he even allowed to be here?"
Person B: "who?"
Person A: "The 12 year old."
Person B: "Nah, that's just a Logan."
by sweatpatch February 02, 2010
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A giant Decepticon with praying mantis powers, causing him to be dubbed "Predacon". He is adept at sending immense amounts of spam at one time.
by Mwargh February 03, 2010
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