Squim

Squim was a male Ferengi, and the nephew of Gweemo, the owner of Gweemo's Lobemaster. Squim came up with the slogan "Keep Your Ears Open. Use Gweem's Lobemaster," which became the most successful advertising campaign in Ferengi history, and was later immortalized when Grand Nagus Drik made "Keep your ears open" the seventh Rule of Acquisition.