lyricosis 

The combining of two words:

lyric: "having a pleasing succession of sounds"

AND
-osis: "a disorder or abnormal state"
to mean when a person is singing and doesn't know or forgets the words to a song so they proceed to make up sounds and grunts to cover the fact that they sound like an idiot.

My sister and I got drunk last night and were singing Billy Jean loudly when I realized the bitch was suffering from lyricosis, she had no idea what the words were.

I love laughing at that dude that always sings for Karaoke even though he has such a severe case of lyricosis.

I don't care if I don't know the words to the song, a little lyricosis usually hides the mistakes.

lyricosis by NaptownRose May 25, 2010

chronic lyricosis 

a debilitating disease wherein an individual consistently hears incorrect lyrics to songs

"there's a bathroom on the right" in lieu of "there's a bad moon on the rise"

chronic lyricosis by cricket March 22, 2005

Chronic Lyricosis 

A condition that effects victims by making them think they know the lyrics to popular songs, completely unaware, that they are completely clueless.

A: *sings the lyrics “bring me a higher love from “Higher Love” by Steve Winwood, as “bring me an iron lung”.
B: I’m really worried that you might have Chronic Lyricosis.
A: Why, what makes you say that? I’m singing it correctly aren’t I?

Chronic Lyricosis by Jefferson Davis (JD) Fuller May 20, 2020

lyrichosis 

When you continue to attempt sing a song even though you do not know the words or have forgotten them.

She suffered from severe lyrichosis on stage, screwing up the entire second verse and was promptly kicked off Idol.

lyrichosis by R.Jarboe December 26, 2008

lyricitis

When you think you know the words to a song but your completey off.

My lyricitis drives people crazy because I really think the my version of the lyrics to a song are accurate.

lyricitis by WordsmithingIsEasy November 2, 2015

Lyrictiscain

When you're too fucking tired to speak english and keep forgetting that the language doesn't have fancy word for poet like german does (which it totally should, by the way).

Fuck u darling if you read this, ily

"Wow, did you write that? You're a great Lyrictiscain."
"The fuck did you just call me?"

Lyrictiscain by toe-lover_69 September 7, 2019