This term was being used while I was in high school, but it wasn't shortened like it is today, the whole term was used and it was a term used to describe an oral sex act. But even though it stated an "act", it was used, just like today, to let someone know you didn't like something. Just like a popular "s" word means bowl movement, but it's not usually used to describe a bowl movement. It's a tacky slang word that I feel Christians shouldn't use. You could use "that stinks" instead and not be tacky.