1 definition by Loey moons
A mean selfish girl. She is the starter of breakups and and friendship problems. If you have a Tilly try to not get too close because she only bullies the ones closest to her.
Girl; who’s that girl over there teasing my friend because of her habits.
Other girl; oh my she IS a Tilly
Other girl; oh my she IS a Tilly
by Loey moons March 20, 2019