To let yourself go means to stop caring about yourself and your outward appearance/hygiene, usually because of depression and/or a traumatic event. Typically, a person who has let themselves go will rarely if ever leave their house unless they absolutely have to, and as a result they will balloon themselves up to quite an unhealthy weight. Their confused friend(s) will often try to get them to come out of their shell, usually with no success.
I know that your mother was a very important person in your life, but you can't just let yourself go now that she's gone.
by Ubeenbamboozledson September 19, 2021

people say this in order to inform someone to "kill them selves" without receiving any consequences from using the harsh term since both phrases are long for "KYS"
by DodgyJuke June 27, 2018

by TheCannon124 September 5, 2016

A colorful method of telling someone to either; a) shut the fuck up
b) go the fuck away
c) go annoy the fuck out of someone else
d) an all inclusive phrase of general distaste which includes a-c as well
b) go the fuck away
c) go annoy the fuck out of someone else
d) an all inclusive phrase of general distaste which includes a-c as well
Practice safe sex & go fuck yourself...
by Wsntmewsntyou June 10, 2018

by cornernickel December 1, 2020

1. Don't take yourself or your problems too seriously.
2.It means stop being so self-centered and conceited.
2.It means stop being so self-centered and conceited.
Get over yourself! Other people are dieing of hunger. Not having the latest cell phone isn't the end of the world.
by Sheh May 5, 2015

To check your actions before you go off and do something stupid, and Shrek the almighty ogre lord decides to kill you.
Man: I hear investing in bitcoin is the way to go nowadays
Man's friend: Check yourself, before you Shrek yourself
Man's friend: Check yourself, before you Shrek yourself
by Imnotameme January 18, 2018
