Luigi 

Being a luigi is being a person who is left out of everything for example Luigi From Super Mario

See tom over there he is so Luigi

Luigi by Hannibal lecter January 16, 2015

Luigi 

do you really need an explanation of marios fucking brother

"Nice of the princess to invite us over for a picnic, GAY Luigi?"

Luigi by JupiterIsPlanet March 17, 2019

luigi 

A referance to a nooblet in real life or in games, the word is originally taken from Mario's half-assed brother who tends to fail in everything, and required constant management or supervision.

The word took on a different meaning due to the actions of a certain individual, famous throughout MMO's for his love of Luigi as a nickname and his constant habit of messing things up, thus causing natural, environmental, or social crisis.A person who does not focus in a conversation and suffers an extreme lack of short-term memory as well as having the ability of blocking out certain sounds or words when it is imperative to hear them. In simpler words, a luigi is what is below the ranking of a noob in all aspects of life.Luigi is gaining in use especially among the online community.
The word can also take on a greater social meaning through the word Luigisim which is a social state where only noobs or retards are left to manage society.

*in an utter hopeless screwup*
the appropriate use of luigi would be:
"OMG, that was so luigetic"

luigi by ToxNanVe March 19, 2008

luigi 

That guy that Mario likes to ride. He's green, but can turn blue when Mario's been on him long enough.

Mario: Hoho! *jumps on Luigi's back*

luigi by Ninjagecko August 4, 2007

Luigi 

After some anal sex, the dude inserts a piece of PVC pipe into the blown out anus of the chick, and precedes to shit into it while humming the underground mario theme music (deedah deedah deedah, deedah deedah deedah). Upon completion of this, the chick shits out dude's shit.

Dude, I gave that chick the Luigi last night!

Luigi by Macinater July 23, 2010

Luigi 

Verb: To do or say something so incredibly gay that it could only be described via the way-too-powerful-to-be-fair uppercut (the infamous Up+B attack) used by Luigi in N64.

1. Dude! You are such a cheap player! Stop using hacks! If you Luigi me again one more time, I'm gonna rip your freakin' eyes out of your head and strangle you with your own ocular cords... Twice.

Luigi by Link&Samus January 5, 2008

luigi 

stoned breaker from Y-town AZ

Luigi gets sick with it!

luigi by aa November 20, 2004