Wiktionary
hang tough
vb. (context idiomatic intransitive English) To remain strong-willed or brave, especially when experiencing duress or adversity.
Usage examples of "hang tough".
Which worked, and because it worked the rest of the NFL bought Lombardi's whole style: Avoid Mistakes, Don't Fuck Up, Hang Tough and Take No Chances.
If you can hang in there long enough, your immune system can beat this thing down, but you have to hang tough for us.
Or you can hang tough and possibly end up charged with accessory to murder.
He just had to hang tough and take whatever nastiness Malone was preparing to hand out.