Menusional 

to be stupid, to not listen and mess up

The girl was so menusional that she failed 3rd grade. Twice.

Menusional by chicky polo July 1, 2011

Melusional

Someone who is; (1) either entirely self obsessed and won’t stop talking about themselves, or; (2) someone that tells constant, compulsive lies about themselves, usually in the form of bragging or storytelling in an attempt to appear cool.

Dude is so Melusional! He called from LA and told us he dated Carmen Electra after he saw her eating in a restaurant in Westwood.

Melusional by Richard Arthur Love July 31, 2007

Mentional Liar 

You mention something that you are serious about, but don't ever follow through with it.

Dad: Lets go to on vacation (completely serious tone)
Daughter: OK WHERE!?
Dad: Las Vegas
Daughter: when?
Dad: maybe next year
...3 years later...
Daughter: You are a Mentional Liar!! For the last 3 years you said that we could go to Vegas!

Mentional Liar by Crazy Kim May 12, 2010

menusionall 

the act of misunderstanding the word dilusional.
Can also mean the same as dilusional, but is somewhat derogatory in that way.
Also spelled, menusional, with one l.

Jack: Hey, are you dilusional?
Brenda: No, you are menusionall!

menusionall by ArabianKnightdog November 13, 2011