While having intercourse, one takes a dump on the others chest and steps in it, representing a foot print, and the shit like dirt. It also has to do with the legend of Bigfoot, which has attempted to be proven by either photos or footprints.
"So what happened with you and Mandy last night?"

"We went back to her apartment and i gave her a Texas Bigfoot!"
by MjolnirXVII July 27, 2009
Get the Texas Bigfoot mug.