The money shirt is any
shirt that is
superstitiously believed to be
endowed with
magical powers of
attraction. These powers guarantee that the wearer will
have sex that night. The shirt is referred to almost
reverently by the owner. This can be extended to other
articles of
clothing, such as the money
hat or money
boxers.
Example: "I'm going out with Melissa tonight. I've got to wear my money shirt to impress her."