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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
Urban Dictionary Merch
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

You met me at a very Chinese time in my life

A moment in time where you feel distinctly Chinese over all other things.
Dante: "I wish I could be Nigerian, but I can't because I'm Chinese. You met me at a very Chinese time in my life."
Word of the Day on September 25, 2026
Adjective. Used to describe persons who have adjusted or altered their lifestyle for environmental reasons. Crunchy persons tend to be politically strongly left-leaning and may be additionally but not exclusively categorized as vegetarians, vegans, eco-tarians, conservationists, environmentalists, neo-hippies, tree huggers, nature enthusiasts, etc.

Also used to describe establishments where alternative foods and products are sold, i.e. natural food stores.

Modified derivative of granola.
"I need more crunchy guys in my life. I'm so tired of dating preppy metrosexual assholes."

"I'm heading out to the crunchy store to pick up some fair trade chocolate and tea tree oil, do you need anything?"
crunchy by EBC July 11, 2007
Word of the Day on September 24, 2026
A group of people, typically women, searching through someone’s digital footprint in order to find more information about that person.
Susie wasn’t sure if her new Hinge match was a creep, so she assembled Galantir and they found out he used to post slurs on gaming forums.
Galantir by Ge-sus September 22, 2026
Word of the Day on September 23, 2026

murderhobo 

In a tabletop game, a murderhobo is a player who murders NPCs indiscriminately. This is normally derogatory, referring to a player who totally ignores quests, dialog, backstory, trade, world building etc.

The term is most common with Dungeons and Dragons, but it can be applied to most RPGs where the player is allowed to kill most quest-giving NPCs and NPC traders. E.g. Elder Scrolls, Fallout, Divinity original sin.
DM: The sad little orphan girl tugs at Steve's trenchcoat to get his attention, and ask for help saving her pet dog from...
Steve: I'd like to roll a strength check against strangling the orphan.
Dave: I call dibs on the dog.
DM: You murderhobos disgust me.
murderhobo by Loup&S September 9, 2021
Word of the Day on September 22, 2026
In sales terms, a whale is a prospect that is significantly larger than an organization’s average customer.

Whales are large and extremely difficult to close. Due to their immense size, they are highly sought-after.

A whale is typically identified at first by a whale hunter on the sales team, but often requires cross-discipline participation in order to close; this includes assistance from operations, engineering, creative, client success, and business development teams.
"Shit...the sales director chewed me out on the sales call this morning. He's totally pissed that I have nothing in my pipeline. I've been focused on this one whale for so long that I haven't had time to prospect for normal-sized deals."
Whale by FQ_GFY February 3, 2020
Word of the Day on September 21, 2026

Concrete cowboy 

A guy who thinks he's a country kinda guy, but in reality lives a comfortable city / suburban life.
Eugene: Look at that dude in the cowboy hat!
Todd: He's just a concrete cowboy.
Word of the Day on September 20, 2026
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