Watch your mouth

this verbal warning and boundary is provided when someone takes personal offense to what someone else is saying. It is meant to urge the person to reconsider what they are saying.

The term can be followed up with an “or else” but it is usually the final warning before a consequence is given (a slap, getting blocked, etc.)

Ann: People from Chicago are lazy, stupid, and unconcerned.

Vance: Uh, I’m from Chicago.

Ann: So?

Vance: So Watch your mouth

Watch your mouth by gayandaloof July 20, 2020

Watch your six 

Watch out for danger behind your back (like you might get jumped or something).

Watch your back.

Keep an extra set of eyes on the back of your head.

Dude, be careful man. Watch your six.

Watch your six by Brent Ninja October 11, 2012

watch yo jet 

A generic warning that can be used in almost any situation to either warn of impeding danger or impending pranks.

Right before I tripped Colby I yelled "Hey watch yo jet!"

watch yo jet by Edarba November 19, 2016

cover/watch your six 

Military term for watching/covering your back/rear side

Stay frosty and cover/watch your six!

cover/watch your six by gunshy77 May 11, 2014

Watch out for deer 

An expression used by Wisconsinites, and Midwesterners in general, meaning "I love you", from "I love you, stay safe", popularized by the comedian Charlie Berens

"I'm headed to the Kwik Trip"
"Ope, it's snowing like the Dickens. Watch out for deer."

Watch out for deer by JoshUABattle October 23, 2022

end of watch 

Term usually used for the date when a police officer dies. Often seen in in memorium posts

'Officer John Smith, NYPD, End of Watch February 31st'

end of watch by aneumann June 4, 2016

https:/www.youtube.com/watch?v=dQw4w9WgXcQ&ab_channel=RickAstleyVEVO 

This is the link to the OG "Never gonna give you up" video. (Well minus a slash at the front because you cant have links :p)

Guy 1: Hey i have a link for you
Guy 2: can i see?
Guy 1: https:/www.youtube.com/watch?v=dQw4w9WgXcQ&ab_channel=RickAstleyVEVO
Guy 2: Seriously.
ALTERNATE TIMELINE
Guy 1: Hey i have a link for you.
Guy 2: oh can i see?
Guy 1: https:/www.youtube.com/watch?v=dQw4w9WgXcQ&ab_channel=RickAstleyVEVO
Guy 2: I'd recodnise that link anywhere. Don's even THINK about TRYING to rickrol me.
Guy 1: Frick-

https:/www.youtube.com/watch?v=dQw4w9WgXcQ&ab_channel=RickAstleyVEVO by SnowytheVulpix January 11, 2021