The phrases or words on girls pants or shorts. Men's eyes automatically drop to see what it says, it is unfair when you are walking with other girls. Or if the girl with the ass phrase is fat, nasty, or both!
A catch phrase is a short cool/funny phrase that someone says for a certain occasion. A catch phrase is usually unique to a certain person. You can't steal someone else's catch phrase because that's not cool. You gotta make up your own.