look up any word, like donkey punch:
 
1.
Gay luigi originates from the philips CD-i videogame, "Hotel mario". When mario and luigi are entering the mushroom kingdom after being invited by the princess to a picnic, mario tells luigi, "Nice of the princess to invite us over for a picnic, eh luigi?". Many people mistook, "Eh luigi?", for, "gay luigi?".
Nice of the princess to invite us over for a picnic, gay luigi?
by somerandomanon June 22, 2008
 
2.
Luigi's homosexual alter ego. Often voices his hope that the princess made lots of spaghetti for their picnic.
Mario: "Nice of da princess to invite us over for a picnic, gay luigi?"

Luigi: "I hope she made lotsa spaghetti!"
by imdgr8st November 06, 2009
 
3.
v. A verb inspired by both a Youtube Poop and Dave Chapelle's definition of a "stranger"; when performing a Gay Luigi, one constantly eggs on someone until they say "Fuck you!", and then you yourself reply, "No, YOU, (person's name)". You then proceed to anally rape the person.
Know what I like to do when I get a massive hard-on? I like to make fun of people until they say to me, 'fuck you!'. I then say, 'no, you', and then I rape them. I call it, a Gay Luigi. Have you ever felt a Gay Luigi?
by KintarosTiger March 23, 2011