don't get your bowels in an uproar
Don't get so upset. Don't get your bowels in an uproar—I'm sure we'll find a solution to this problem.
Don't get your bowels in an uproar!
Do not get so excited! Bill: What have you done to my car? Where's the bumper? The side window is cracked! Bob: Calm down! Don't get your bowels in an uproar!