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fly-by-night 

an unprincipled person who just gets involved with someone or a job to meet their need and evacuates to next donor.
Watch out Kim, he's a fly-by-night, he'll use you and be gone in the morning.
fly-by-night by prodigal's boss December 23, 2014
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Fly By Night 

Song written by Rush in their 1975 album Fly By Night. Contrary to their debut album, Fly By Night was the first to express elements of Progressive Rock the band is known for
Person 1: Did you hear Fly By Night in R40?
Person 2: No, it wasn't in R40
Fly By Night by newhavenrailroad January 30, 2017

Fly by night 

Type of contractor that takes %50 deposit from home owners in new communities then disappears over night with multiple hundreds of the unsuspecting victims loot.

To get high in the evening.

To start a bender this Friday that steamrolls Monday meetings.

A magic carpet ride when you rent a limo bus for an out of town party tour for the summer and go on tour singing live operatuneist.
Some of them irrigation contractors are fly by night so be sure to ask for their certification # from Centre For Irrigation Technology.

fly by night 

A slang term used to describe someone or more than one person (can be as large as a business or any other entity) who is extremely unreliable, unless they want something from you. To put these dirtbags in their place, one must confront them directly face to face. This term is different than a flake, as a fly by night DOES contact a person, but only when they want something, whereas a flake or flaky person DOES NOT.
Tim was such a fly by night about turning in that homework for our group, he got us an F! But then when he wanted a ride home from the bar, he contacted us left and right! That guy can walk his ass 3 miles to get home!

Kurt's fly by night attitude caused him to not be liked by his friends, and for him to only get sex from more undesirable types of women with hairy vaginas.
fly by night by johnnyb69 January 31, 2010

fly by night 

After I pull this last Bank job I'm gona fly by night... You know isa got the ghz. Isa hertz'n so bad I'm gona fly this old koop by night back to alie-bama get's some good grits.
fly by night by itichie_nocanpo October 17, 2006

fly by night mother fucker

The type of person who is shady, scandalous and typically does dirt in the late hours or very early morning. May have a girlfriend but never sees her due to his extracurricular activities he chooses.
Girl you don’t need him, he’s one of those fly by night mother fuckers.
More from Urban Dictionary
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
any hard liquor that is cheap & potent.. eg. relska, popov, potters, evan williams, kamchatka, fireball, rumpleminze, southern comfort, everclear
hey let's get a drink of that?

go ahead
*takes drink* ugh wtf is that?

everclear & bepsi
fucking hobo loko eeessshh
hobo loko by d i z k o 2 0 8 September 14, 2026
Word of the Day on September 19, 2026

God Shot 

A chance happening with profound meaning, an unexpected blessing, a "sign".
Dr. Drew on Celebrity Rehab said "All of a sudden what had been just another Hollywood proposal became for him an unexpected blessing, an opportunity for growth. In drug recovery language, that's called a "God shot."
God Shot by Imogen1564 February 25, 2011
Word of the Day on September 18, 2026
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