A slogan was a phrase intended for repeated use to express an idea in a brief and memorable fashion. It was common in propaganda and the related field of advertising.
When General Martok asked Alexander Rozhenko why he was serving on his ship, Rozhenko replied, "to serve the empire". Martok immediately criticized this as a being a slogan instead of an answer. (DS9: "Sons and Daughters")
As of 2374, Slug-o-Cola hadn't changed its slogan in three hundred years: "Drink Slug-o-Cola. The slimiest cola in the galaxy.". Despite this, Quark (disguised as the female Lumba) made a well received pitch to change it to "Drink Slug-o-Cola and keep your teeth a sparkling shade of green", which (s)he claimed would appeal more to women. (DS9: "Profit and Lace")
- Bang Bang: "the sweetest little automatic in the world" (TOS: "A Piece of the Action ")
- Borax: "Borax is king" (TNG: "Time's Arrow")
- Carlton: "If you smoke - Please try Carlton" (Star Trek IV: The Voyage Home)
- Cetacean Institute: "Have a Whale of a good time" (Star Trek IV: The Voyage Home)
- German invasion forces in the United States: "Two Nations - One Voice" (ENT: "Storm Front", "Storm Front, Part II")
- NRA: "We do our part" (TNG: "The Big Goodbye")
- Millennium Gate: "Tomorrow's metropolis today" (VOY: "11:59")
- Pacific Bell: "Let your fingers do the walking" (Star Trek IV: The Voyage Home)
- Pepsi-Cola : "Be sociable. Have a Pepsi" (ENT: "Carbon Creek")
- Rock climbing : "Go climb a rock" (Star Trek V: The Final Frontier)
- Starbase Yorktown: "Adventure begins here" (Star Trek Beyond)
- Incredible Tales: "Write or Die" (seen in the editorial office) (DS9: "Far Beyond the Stars")
- Wee Bairns: "Now there's a drink for a man"