Como dizer "Segure Firme" em inglês

Caio,

A expressão é "Hang on tight!" (segura firme!). O "tight" dá ainda mais ênfase.

Humm, obrigado. Mas tem outra expressão com o mesmo sentido sem o hang on, ou não?

Yes, there is.

= Hold on tight!

"Tight" is for emphasis and is not necessary.

Hang on! = Hang on tight! = Hold on! = Hold on tight!

Huumm, ok. Valeu mesmo gente! ;D

When I was a kid, I used to hear "Let'er buck!" It's a cowboy expression meaning that the cowboy is ready to ride the untamed (unbroken) horse, and the horse is free to buck (jump, attempt to dislodge rider). The expression could be used to mean "I am holding onto the truck and I am ready for the driver to start", "I am seated on the motorcycle and ready for you to acelerate." And so forth... Of course, it could be said about another person who is holding in tightly and ready for the ride of his life.

also...

Hang on for your life!
Hang on for dear life!

Ah, eu achei uma expressão no mesmo filme "Sit Tight" ... O que é ?

"Hang in there" é uma opção se você está pedindo que alguém "aguente" mais um pouco em algum lugar/situação difícil.

"Sit tight" = Wait. Don't move. Stay here.

I know you are eager to go to the movies, but you will have to sit tight until your sister comes home.
Sit tight. I'll be right back.

to sit tight = not to move, to wait, to be patient

I know you are eager to leave, but you must sit tight until your sister returns.

Hmm, ok. Thank you. ;D

Se possível, aguente firme = segure firme

stay strong!

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Valeu! ;D