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 is an overall cheap ass, unable to pay for other peoples expenses yet alone their own. generally unclean, smells bad, wears same clothes for days on end, showers on an annual basis.
David Mickleburgh: I've got 5 cents to spare, whos gonna buy me food and some new clothes

Person 1: Youre such a fucking grub
by muckface fcgeezacks September 19, 2009

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verb: to eat, especially heartily
grubbed: past tense of grub
My stomach's eating my backbone dude, let's stop and grub.

Dude, I left my shades back where we grubbed!
by shankus November 30, 2004

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grub
A highy despicable person with no class, grub is a good name for anyone that is: rude, obnoxious, self centered, stuck up, diry, ultra conservative/liberal minded, slutty, sleezy, deadbeat, guy that cheats and beats on hes women, pervert, rapist, pedophile, bogan/trailar park trash etc
grub hey baby ur looking hot tonight lets go back to my place :P

random chicks: no thanks dont know u that well

grub: u good for nothing whore how about u suck my dick in the toliet and ill cum like a real man

random chicks: were im going seeya looser

grub: ill grab u by the hair and smack u in the fucking chops

random chicks: nice one u grub, TAXI!
by jx12 August 29, 2011

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A worthless, cute, wasteful, or cheesy copy-and-pasted motivational post on Facebook that no one, anywhere, cares about. The person who does the posting is known as a Grubberface.
Facebook should invent a tool for us to flag worthless grubs like "Yeah, Reading Rainbow is on!"
by UrbRC October 07, 2010

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Lazy guy who doesn't do their homework.
Joe was so lazy... what a grub.
by real4269 April 14, 2009

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Slang Commonly used in America. A dirty, slimy person who does not have proper hygeine, talks in incomplete sentences and generally as very uncouthe behavoir
Hey mom look at that kid he is a grub
by Jesus767 August 30, 2009

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A negative term for a male who engages in sexual activity with many different females.
Flavor Flav.
Ben Mitchell is such a grub he hooked up with jordan soboski and later on that same day hooked up with haley.
by GRUBFREE July 10, 2008

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