Top definition
1) A smart thing to do.

2) Something people with common sense do when there is water falling out of the sky.
1) "Wow how did you think of doing something so smart?"
"I don't know; all I'm doing is using an umbrella."

2) Me: "Look there's water falling out of the sky."
People with common sense: *pulls out and opens umbrellas*
People w/o common sense: *don't use umbrellas, get pneumonia, and DIE*
by Live.Love.Learn July 31, 2009
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