I would post this as an image, but my account was lost in the transition, and I am not allowed to post images as a “new” user.http://www.lonestarbannersandflags.com/wp-content/uploads/2012/08/Old-Come-and-Take-It.gifThis is the historic flag from Texas history that the shirt is referring to. More details at: http://en.wikipedia.org/wiki/Come_and_take_it
The flying uterus has also been a satire/criticism of UT-Austin’s longhorn logo, which sells a large number of t-shirts in the color scheme presented here (“burnt” orange and white).
