It's a rivalry that's gone back a long time. But the friendly competition between San Marino High School and South Pasadena high got ugly this week when cheerleaders from San Marino put up posters with vulgar language.
The San Marino High School pep squad plastered the San Marino boy's locker room with posters… some with obscene messages, another poster showed a sexually inappropriate word and referenced a porn actress.
All of them were directed to the players at South Pasadena High before the schools varsity game Thursday.
The images of them hit Snapchat and Twitter and went viral.
"Kids at my school are really angry about the posters," says South Pasadena student Ry Patterson.
San Marino's principal Mary Johnson says some parents called the language "locker room talk," but she says the banners were unacceptable and as a result, the pep squad was banned from taking the field at Thursday night's game.
South Pasadena Principal Janet Anderson says she spoke to students over a PA system Thursday.
"She told us to keep the sportsmanship good at the game and to protect the Tigers' integrity and don't cheer when they get injured and stuff. Just to keep calm," says Anderson.
Both principals stressed the schools have a very strong relationship.
As for last night, San Marino's drama team took the field instead. Their ASB team held up the school banner.
The principal says the pep squad will be allowed to perform at next week's game.