19xx 

MGK and his fans' saying.

It usually goes behind EST and means everyone stands together, regardless of age, race, and social class

E.S.T. 19XX is my team bitch!

19xx by Froglegs317 August 5, 2016

19XX 

literally any date from early/mid/late 20th century

Website: XX/XX/19XX
You: Ahh... perfect. now i can log in my old ass account that was made in 2002

19XX by NewYork6792 June 4, 2025

est 19xx 

Everyone Stand Together, regardless of age, race, social rank. Machine Gun Kelly's movement

EST 19XX That's my team Hoe!

est 19xx by AshleyEstgirl19xx May 25, 2014