A girl with big/toned thighs, plump booty, normal sized hips AND a flat/toned stomach. These girls are slimmer than "thick girls" but are still considered thick. What really defines a slim thick girl is her big, juicy thighs paired with a slim figure. They can have smaller curves than thick girls (who have an ideal hourglass shape).
Boy #1: look man, that girl has juicy thighs with a slim figure!
Boy #2: yeah man, that girl is slim thick!
Boy #2: yeah man, that girl is slim thick!
by Jenny.V January 08, 2015