battle flag 

1. Commonly referred as the confederate flag but the battle flag is the flag use for battle not to confuse with the confederate government flag the battle flag was actually rejected but the military needed a flag to use bc the other flag before was too confused with the union's flag

2. A flag used in battle

3. Most commonly used as a symbol of southern pride but other say it is hatred and slavery

Why are you flying the confederate flag

That's not the confederate flag that is the confederate battle flag

battle flag by Dr.Snake53 July 5, 2017

moon flag 

The process of religiously wacking off into a single piece of cloth or small towel over the span of weeks or months until it can stand up on it's own like the american flag placed on the moon by the astronauts. Typically made by members of the armed forces, monogamous business men, and teenagers at summer camp.

Dude, this is going to be a long deployment, I think I'll make a moon flag as an experiment and then see if I can break in it half before we go home.

moon flag by Poopsicle_8251 May 16, 2018

Mass flag 

The act of flagging all of a YouTuber's uploaded content due to heavy disliking or clickbait (misleading content).

I decided to mass flag all of Riot's videos cause he did something against the law!

Mass flag by AaronReturn2005 March 18, 2019

Dead flag 

When a mobile application has one remaining notification that doesn’t go away

I wanted to see that I’m up to date on LinkedIn but there’s always a dead flag there that I can’t get rid of!

Dead flag by Imlolilimili May 6, 2020

Red Flag Agitator 

An antiquated term for a member of the communist party that attempts to cause political discourse and riots in an attempt to spread the word of communism

Arthur - "I'll tell ya, with all of these damn red flag agitators you'd think the world was going to end!

Red Flag Agitator by The Rectifier. January 8, 2021

rainbow flag 

like a red flag, except it's a sign the person is not straight.

Dude, those shoes are a total rainbow flag.

rainbow flag by cyclopentane April 20, 2023

Have a Flag 

to be claimed "not available" for dating-but not in an official relationship.

Joe: "Wanna' get a some dinner and a movie on Friday?"
Jill: "Not on a date- I Have a Flag."

Have a Flag by BirdVery October 8, 2008