Letting It Fly

to do something with a serious risk that would reap an equally serious reward if successful

If someone risks his career for a loved one, that would be letting it fly.

If someone takes a shortcut while driving by quickly going the opposite direction on a one way road when time is of the essence, that would be letting it fly.

similar as to throw caution to the wind

by Nathaniel Bacon March 13, 2009