An SOS shopping group created on ToonHQ.org.
SOS shopping is the practice of entering a Vice President boss battle in hopes of finding a desirable SOS Toon and therefore earn desirable SOS cards from said SOS Toon. Although it is generally acceptable gameplay, it can be considered a form of greening and does violate Toontown Rewritten's Terms of Service if an SOS shopper enters a Vice President boss battle without prior consent from other players of an entire group.
Players can commonly find SOS shopping groups via a group tracker on ToonHQ.org.