"Toodle oos" is a playful and informal way of saying goodbye. It's a synonym for other informal phrases like "see ya," "catch you later," or "take care." If you're looking to mix things up, you could also try saying "ta-ta," "cheerio," "adios," or "peace out." These all convey a similar friendly and casual tone. Alternatively, if you want to add a touch of humor, you could say "hasta la vista, baby," or "later, gator." Ultimately, the important thing is to use a phrase that feels natural and comfortable for you, and conveys the sentiment you want to express.