Here are some of my personal favorites! Used in everyday life, when warranted.

Beautiful like the backside of a frying pan. (Italian)
As the skunk said to the squirrel "If you don't like it here, go somewhere else!" (Italian)
It smells like 20 miles of what-the-hell. (West Virginian)
Cut once, measure never. (The Furniture Guys)
Go cram Play-Doh up your nose. (my sister Cbo)
Who cares what it looks like, as long as it tastes darn knarley! (my sister Cbo's #1 Rule for Life)
You look like the last rose of summer (my mom)
This RULES! (me)