"Get a grip"

does this expression mean anythin to you guys?

Get a grip ~ Cope with the situation

wow thnx dude

:)

I'm not sure I can use the expression properly.

Here's an example:

-SissyWimp says, "Ewww I got a some mud on my shoes."
-Bob replies, "Oh, get a grip. It'll come right off."

thnx Steve