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To fuck up, mess up or destroy. Word originates from Cheboygan, Michigan.
I gotta take a dump. I'm gonna mastify the toilet!
Mastify by Buckostar November 19, 2010
Words you can keep
Mastiff is a large powerful dog that has a droopy face who loves to drool on the floor and your clothes when she comes over for a pat. She is an extremely protective family member and will challenge all intruders but is the biggest sook to those she loves.

Hagrid's dog, Fang from the Harry Potter movies is the most famous mastiff in the world.
Hey man, that mastiff is massive, can I give her a pat?

Sorry dude, you can't,she doesn't like strangers.
Mastiff by All in the mind July 1, 2016

english mastiff 

A huge fucking dog! That likes to steal your bed and like to cuddle and think they're a lap dog
Big ass dog!! Like huge English mastiff!!!
english mastiff by Stufflover October 5, 2013
A type of person who doesn't care about his friends, only cares about his role and has a biased father.
Hey you are just like Mattify! but a 2.0
Mattify by YouDonTNeeDToKnoW69 September 6, 2019
Huge, undeterminably gigantic; gynormical
That wave was mastiff.
Mastiff by wil colligan February 9, 2008

bull mastiff

135 pounds of short-hair nasty that will cause strangers to shit their pants while at the same time lick the hand of their owner and devour any vermin that walks its way. The PERFECT porch dog! Gets respect at the vet (you KNOW what I mean). Little girls back away, then when you say, "No, it's friendly," smother the dog with huggs. It's why you love dogs in the first place!!
Oh, shit, that thing is gonna eat me-- Oh, it's just your Bull Mastiff.
bull mastiff by Fdale-boy March 4, 2011
the biggest, best, and most badass of all dog breeds.
My mastiff is 10 months old and he already weighs 100 pounds.
mastiff by jenna leigh November 12, 2007
More from Urban Dictionary

Salad Days 

green inexperienced youthful judgement and cold blooded execution of those judgements.

Rashness with little concern of consequence.

Antony and Cleopatra. William Shakespeare

"My salad days,
When I was green in judgment, cold in blood."

- William Shakespeare, Antony and Cleopatra, 1.5
"How did you end up in jail?"

"Salad days, 'nuf said."
Salad Days by GilbyRFC0 October 7, 2011
Word of the Day on August 28, 2026

age gate 

An absolutely foolproof way to keep minors from viewing content deemed "too mature" for them to watch.
Billy: "So I was trying to watch some videos for an M rated game, and I ran into an age gate, so I put in my real birthday. SOMEHOW it managed to figure out that I am 12. CURSE YOU AGE GATE!!!"

Bill: "Fucking age gate! *quick scroll* THERE! I was born on January 1, 1904. Fuck you age gate."
age gate by Banja January 7, 2011
Word of the Day on August 27, 2026

board chow 

A)
The Crud that collects under the keys in a keyboard. Usually more severe in the keyboards of programmers and webmasters as they tend to spend a lot of time at the the computer and thus eat at their desk. Mainly affecting IBM Model M (clicly) style boards.

B)
Can also be used to gross out Non-Techie people
A)
Bill: want to go to the club?
Bob: No, I've got to clean out my board chow, keys are starting to stick.

B)
Bill: Want to go out to get a bite?
Bob: No, i am just going to have some of my board chow/
Bill: Whats' that?
Bob: The food scraps that collect in my keyboard; Want some?
Bill: *GAG* *HURL* *GAG*
board chow by BinaryHackerMan September 3, 2007
Word of the Day on August 26, 2026

young pup 

a young person, a young adult in their late teens/early 20s.
Ah, you're just a young pup at 23!
young pup by the dog May 30, 2006
Word of the Day on August 25, 2026
West Midlands slang word for rockers, bikers, greasers etc. In the late 1980s it was used by the UK music press to refer to a specific scene centered around the bands Pop Will Eat Itself and Crazyhead. The term never found favour with readers of 'the inkies' (Sounds, Melody Maker and the still extant NME) and was soon dropped. Now often used in predominantly working-class areas of the midlands and the north to mean someone who listens to rock-derived music and/or dresses in a manner that suggests they affiliate themselves with rock music of some kind.
Some grebo passed with Sabbath playing on his stereo.
The Poppies are at no. 17? God, a grebo band in the charts!
They're playing nu-metal now, bloody grebos!
grebo by cactuscat September 15, 2006
Word of the Day on August 24, 2026

TikTok Farlands

TikTok Farlands is a term to refer to videos that you see after scrolling for a long time. These videos can potentially be disturbing, or weird. Said videos can also have low likes, or low comments.
“I reached the TikTok Farlands bro
Word of the Day on August 23, 2026
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