usually said to someone immature, or who gets on your nerves. Usually means to grow some pubes, or some balls.
by FerretMan November 03, 2004
On the definition of his name, Gumba challenged his chicken shit enemies and creed-hating imitators to grow some and stop being so scared of tackling him in a real flame war.
by Gumba Gumba April 13, 2004
You're sitting at a stop sign hoping to make a left, and the person in front of you is also attempting to make a left turn. However, this person in front of you is being very timid about reading traffic and making his move and you're increasingly pissed because he's missing oppertunities so you start screaming "Grow Some!"
by DJ Swellous December 14, 2010