Simply put, stinky balls. To have stalls is to have stinky balls. It's just a combintation of both words and pronouned just as its written. Simillar to the words swalls (sweaty balls), and swass (sweaty ass).
Synonyms for stalls
On this page, you will find 30 slang terms related to stalls. Some of the top words include: Blass, ass fudge, Wrinkled Grommet, Pearls, shunky, and 25 more.