On Twitter, @paddynotpatty points out, "It's that time of year again."

Indeed it is, when the mock-Irish and faux-Irish will chatter cheerfully about "St. Patty's Day." 

Patty is a woman's nickname, diminutive of Patricia, a flat cake of chopped meat, a meat pie, or a peppermint candy. 

The diminutive of Padraic (Irish) or Patrick (English) is Paddy. 

Get it right and reward yourself with a Guinness.