Self-proclaimed cougar Vivica Fox might be ready to dump her latest boy toy, club promoter Slimm. At his 26th birthday party at Geisha House in Atlanta, which Fox hosted, Slimm — who was celebrating with Allen Iverson and Jermaine Dupri — was seen chatting up several female guests. Fox, 45, and Slimm later got into a tiff because she felt Slimm wasn’t appreciative of her. “She’s questioning whether Slimm is grown enough to handle her,” said a source close to the actress.