Johnny Conkeroo, High John Conqueror Root- The mature root of ipomea jalapa, a member of the morning glory/sweet potato family, resembles testes, hence a symbol of masculine power/prowess.

Mojo workin'- references an investment by the client in a spell or work for personal power, luck, sexual success, etc., usually embodied in a collection of mystically powerful objects/herbs anointed with specific oils and possibly prayed over to accomplish the client's desires and carried in a 'mojo' or 'mojo hand' on the client's person...