When your eating a girl out, who has giant mud flaps, her beef curtains fall down around your neck. This forms a taco neck.
Man Igot taco necked last night.
by Chamby86 May 05, 2008
One of the most popular sleeping positions when traveling. The head is tilted to a side resting on a window, seat belt, pillow, etc. Resembles a position you would make with your head when eating a taco. Results in neck pain and a really shitty nap.
That overnight bus to Phoenix killed me. I had taco neck the whole time.
by david10 March 14, 2007