Take a leap of faith
To trust or believe in something uncertain.

Throw caution to the wind
To act without worrying about risks or consequences.

Go out on a limb
To take a risk, often to support someone or something.

Risk life and limb
To risk personal safety or health.

Roll the dice
To take a chance on something that has an uncertain outcome.

On thin ice
In a risky or dangerous situation.

Take a gamble
To take a risk in hopes of a positive outcome.

Walk a tightrope
To be in a delicate or risky situation.

Bite the bullet
To face a difficult or risky situation with courage.

Play with fire
To take dangerous risks.

Take your chances
To risk something with hope of success.

Stick your neck out
To take a bold risk, especially when others don't.

Burn your bridges
To take actions that make it impossible to go back.

Throw the dice
To take a risk on something uncertain.

Out of the frying pan into the fire
To escape one bad situation only to end up in a worse one.

Put all your eggs in one basket
To risk everything on a single opportunity.

Dicing with death
Taking extremely dangerous risks.

Risk it all
To put everything at stake.

Between a rock and a hard place
To be in a difficult situation with no easy solution.

Bet the farm
To risk everything you have on something.