Some funny t-shirts for your Friday: visit the Mental Floss store here. Funny, that is, if you think slogans like "Idioms are for the birds" and "I avoid cliches like the plague" are funny.
And I do.
There are also nerdy ones for the mathmatically and scientifically inclined, including a few I don't get. ("Mole Problems? Call 602-1023"...huh?)