A sexual position involving three people, preferably one male and two females. The male lies down while one of the cunts rides his cock and the other buries her vag in the guy's mouth. While doing this, the two cunts face each other and make out, thereby causing a grand triangle.
Derek: Did you hear Eric and those two sluts from Downtown Brew did a grand triangle last night?
Jamie: What's that?
Derek: It's comparable in awesomeness to that time me and him a-teamed you
by My nigga bovice! December 8, 2007
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This is the title given to the single being who can play chords, solos and flight of the bumblebee at the same time, upside down with his hands tied be behind his back, on the same triangle. Which must be tuned to B flat.

There can only be one Grand Master at one time and you must travel on an epic quest to the Andes to learn the ways of a true triangle guru.

The current grand master is Max Maloney, the previous one was Chuck Norris
Person: "Wow, look at that triangle player he's amazing!"

Triangle Grand Master: "That's because I am the grand master, now bow down mortals!"
by TheInternatTriangleAssociation December 20, 2012
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