2. A sheep, that is, one who follows the crowd
3. Opposite of round
4. A shortened form of flatass, meaning something that is hip, cool, or awesome.
2. Yeah, them hipster hottie chicks. They such flatties they on the field baaing!
3. Muhaha! My circle is round but yours is a bigly flatty.
4. Woah, man, this new car is way flatty (that is, flatass).