A small person that is extremely adept to stealth,stamina and being ninja or be a person for moral guidance
Ex.1 Dude how can you sneak up on me you Keith.
Ex.2 thank you for listening to what i have to say,your such a Keith.
by Irick101 December 11, 2008
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In Left 4 Dead 2, he is the buddy of the survivor, Ellis. He grew up in Savanah with Ellis together, having all sorts of adventures, They were separated when the infection began, but Ellis still brags about his buddy Keith whenever he gets the chance.
Keith has supposedly survived these, as well as several other incidents, as explained by Ellis:
Burned on 90% of his body on multiple occasions.
Thrown through a car windshield breaking both of his legs.
Ran over by his own mower. 90% of his body cut up.
Teargassed.
Bombed with chemical, frag, and incinerary bombs.
Stabbed in the back by a ghost, or possibly a hobo.

There is some speculation whether Keith is a real person or not.
"This one time, me and my buddy Keith..."
"Ellis, not the best time."
by Kil Lerown January 7, 2010
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A Keith,
A Guy that is so amazingly hott he doesn't know it. He really has no clue. Funny, considering he is so intelligent you think he'd get it.. Has a really handsome smile and these bright eyes that make you shiver and giggle. He's sweet natured and kind. Goofy and tends to do weird things like try to make you fart or bite your nails for you.. but probably the best guy you'll ever meet. Keith's are a catch and you usually don't know what to say to them except nervously texting "your awesome." Don't let him pay for you every time, it's amusing to see him get mad at the chinese lady for taking a girl's credit card over his. P.S. Amazing in Bed. Freaking Amazing. So pleasing it's unbearable.
Me: Keith! You are so sexy
Keith: No, I'm not.
Me: Seriously, Keith, Do I have to post pics to make you believe me?
by IiSaReDnEcKlOvEr September 6, 2013
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The art of coming up empty handed after a full nights worth of effort with a lady. Spending the entire night full of conversation, then pillow talk till 5 a.m. without sealing the deal are all symptoms of being keithed.
from female... "He came home with me last night and I was ready to do him, but I got keithed" from male.... " I am going to give this girl a good keithing tonight"
by The Weedler March 21, 2009
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Someone with a very strange sense of humour, usually someone who never gets round to moving out from his mums, tends to attract strange minx like creatures who worship the ground he walks on
minx: do you have your own place?
boy: No, I still live at home.
minx oh, your a Keith
by dayhater November 28, 2011
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The most lovable awesome guy ever... like i fucking love this kid
Never boring to talk to
Extremely Cutee
Super Nice

The Perfect kid ever
Might make me angry some times but always saves it in the end with the cutest compliments EVERR
Tends to be on the shorter skinnier side

Falls in love and sticks to them
Has Brown hair and brown eyes

Is Mysterious too most people but if he really likes you he'll let you in on his life
You've got to love this kid because i know i do <3
Girl #1: Who you txting

Girl #2: Keith
Girl #1: What'd he say?
Girl #2: He told me he love'd me
Girl #1: Aww he's a keeper definetely
by whatacutiepie7 June 29, 2011
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the act of staring at another with no intention to convey and idea or thought. usually with glassy eyes and a tilted head like a dog being confused.
"quit keithing me, you are starting to freak me out."
by towguy October 9, 2013
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