This wasn't for our FIRST team but our BEST motto was: "Don't worry about it"
Seeing as I was president for my High Schools BEST team and it was held at my house I grew to hate this phrase...
Scenario:
After turning around I find that my "team members" had found my blowtorch, which I had hidden that they wouldn't use it, and had lit all the pine needles on my driveway on fire. I flip out, "what the #^*^#%@*^*@ is going on!!!!!?"
The answer: "Don't worry about it"