Noun - The oversized speed bumps/lane markers used in Texas intersections. Origin presumably comes from the shape and size of the bumps, which are large enough to do severe tire damage at high speeds - each one is roughly the size of half a volleyball. Color varies from White to Orange.
"I was blowin' through a red light when I hit a Texas Titty and it dang near tore my rim off!"
by Jimmy The Head November 16, 2004
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