A dirty, uncouth person who does not have proper hygeine, often characterised by a low level of education, often engaging in disgusting behaviours and often associated with hardcore illicit drug use.
Look at the grubs hanging around the Methadone clinic.
by Alan344 September 08, 2009

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A person who seeks what they see by insistent solicitation and entreaty. Characterized by some presumption that they have a right to possess what they see even if it is yours. A grub will often consistently nag you if they really want what you got. Sometimes the only defence to a grub is to tell them to get the hell away from you and to get their own.
normal person: Hey check out my new Mickey Mantle baseball card.
grub: Can I have that?
normal person: As if! You aren't serious are you?
grub: I thought you didn't need it.
normal person: Why?
grub: I thought you wanted me to have your baseball card.
normal person: What are you nuts? If I didn't need it I would sell it.
grub: No, I just thought you were being nice, besides c'mon what good is that card to you.
normal person: Just stay the hell away from me.
normal person: Get your own!
by nick February 11, 2006

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A person or people who crawls to management in a company and undermines other workers in the process for there own personal gain at the expense of others
Worker 1 "That grubby cunt from the West is in the office again crawling to the boss"
Worker 2 "I hate that fucking grub"
by MrX0000 March 04, 2010

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A grub is a person who is a sloppy mess. They rarely shower and are constantly filthy. This word was derived from the legendary cottage vacation of RB.

Ryan: Dave's hair is greasy he hasnt showered in a week.
Matt: Wow! What a grub!
by Ryan12345656 May 27, 2008

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In L.A. slang something that is extremely delicious and fulfills a deep hunger, especially when one is drunk and or high.
Damn, that Burrito was grub as fuck!!!
by BobbySax September 09, 2010

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In Gears of War, COG slang for Locust soldiers, called this because of their tendancy to pop up from the ground in holes also called grub holes.
Damn I just killed 3 grubs within 5 seconds!
by TheDuhMan August 05, 2008

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Shortened version of grubby; an adjective to describe one's uncleanliness.
"Err my feet are well grub"
"I've never seen anyone as grub as that in all my life"
by grandmafunk July 03, 2006

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Wasi (also known as a bulldogs supporter) can be found shoving down kebabs whilst crying that Ben Barba doesn't play for them anymore
Wow look at that grub eating his kebab
by Beeaiitch July 15, 2014

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