When you're getting a blowjob from a girl who gags (either from being drunk, the blowjob act, or both) and vomits on your johnson.
That 5 peso whore in Tijauana drank so much tequila she gave a wicked border dog, but at least then she finished the job.
by borderdude123 June 12, 2010
Get the Border Dogmug.