Having a bowel movement. (Number 2 is the designation for having to take a bowel movement, and it is generally the catcher's sign for a curveball to be thrown.
by tbrazen June 17, 2009

An extremely hot girl, SO hot that she in fact buckles your knees, much like a good curveball will do when it looks like its coming at your head and then the bottom falls out of it.
by Wonderboy 2k January 21, 2006

by Baseballer_09 July 29, 2016

by Dr Turbotnik September 2, 2005

A Texas Curveball is an uncircumcised dick with foreskin all the way up to the urethra, with a large round head and a thin crooked shaft. So-named due to the penile deformity resembling the curveball arm configuration of MLB pitcher Clayton Kershaw, a Texas native.
by Nickf2019 May 17, 2019

by Frank ruboneout November 18, 2013

by Slightly_Mad April 18, 2006
