Tell Me Something Funny

I've lived in 10 countries. Part of the learning curve to being a newbie in each place is understanding "funny" things they say. Is there something funny or different that you say where you live that others might not understand or would think is funny -- an expression, not just something said in a foreign language.

What to swap: Send a naked postcard to 2 people. 1 PC to 2 people = 2 PC. On the back, write at least one funny expression and explain what it means. Sender's Choice.

Who can join: For this one, you must have at least 4.95 and unrated newbies with complete profile can join. This is meant to be fun, so most everyone can join. As always, I will angel if necessary. I will also toss out anyone I have questions/concerns about.

Thanks to Tigerlilyknotwise -- I adapted her swap for a word definition to this.