To kiss a turtle

To take a chance for the sake of taking the chance. To take control of your life and step out of your comfort zone.

Dude: I think I’m going to try out for the varsity basketball team

Gal: Way To kiss a turtle!

off your rocket

Someone who meant to say “is off their rocker”, but is bad at idioms.

1: You are off your rocket
2: I think that it’s rocker
1: Right, I’m bad at idioms