What does "fill out" mean? (Read below)
I'm kinda small and my mom said "don't worry you'll fill out" what did she mean
If you're a boy-you will get broader, taller, get muscular. If you're a girl-you will get taller(a bit),& curvier--grow a butt and your boobs will get bigger.
It means you'll get bigger, taller, broader in time.
for girls-get a figurefor boys-get taller, more muscular