Grown syndrome 

When someone acts older than their age thus making them look younger and dumb.

shitskia: I'm in love I know I'm only 14 but it might just be real!

Tanishia: Gurllll you got a bad case of grown syndrome

Grown syndrome by XOTWODOVO July 9, 2016

rachel syndrome 

Rachel syndrome occurs when someone gets the giggles. Rachel is someone with a really weird and/or cute laugh, so if someone has Rachel syndrome, they cannot stop laughing at the most stupid things.

Oh my god, that girl is so obnoxious... she must have Rachel syndrome.

rachel syndrome by mermaidgirl5678 April 3, 2017

crackhead syndrome 

When your peers constantly assume you’re high because you’re energetic. it’s natural, and your normal personality. Crackhead syndrome can also be when someone is pretending to be high because they’re surrounded by high people.

Look at Macy, she keeps screaming and running around talking about belly buttons, she SO has crackhead syndrome.

crackhead syndrome by Legend27 April 7, 2019

Textless Leg Syndrome 

Similiar to textless syndrome, but with a better pun. You think your cell phone is going off with a text from your crush, but it is just your nerves. Common when sitting on the couch, watching TV or twiddling your thumbs. Symptoms include sweating and restlessness.

There it was again. The feeling. John slowly reached down and grabbed the phone from his pocket... he glanced down at the phone... no text. The sixth time he had done that. It seemed as if Emily would never text him back. He had heard of this. His friends once had a mild case of Textless Leg Syndrome, or TLS, but this was the full-blown case. It was teenage hunting season.

Textless Leg Syndrome by Texter 4000 January 12, 2009

New Track Syndrome 

When a musician of any genre (although the term is more often used for hip-hop artists and producers) creates a new song in which they enjoy upon the first couple of listens, but then the next morning they realize that what they had made is absolute garbage. This individual has been a victim of New Track Syndrome.

I made an awesome new song last night but I listened to it again this morning and it seems like it was just new track syndrome or something because the song sucks!

New Track Syndrome by iitsMOOKIE February 23, 2009

Post Ramones Syndrome (PRS) 

Feeling suddenly sad and depressed because after you realize that your mindset of all the Ramones being alive fades away. (3 of them are dead; Joey, Dee Dee, and Johnny)

Friend: Why are you so sad today?
You: Ah, I'm suffering from Post Ramones Syndrome (PRS)

Post Ramones Syndrome (PRS) by Quazlo9 November 5, 2009

Mail-man syndrome

When a child in the family looks nothing like the father or siblings.
It implies that the mail-man is really the father of that child.

the mother is blonde and green eyed, the father is brunette and brown eyed, child 1 is brunette and green eyed, child 2 is blonde and brown eyed; however, little Bobby is a ginger.

People would say he has "mailman syndrome" or call the situation in general "mail-man syndrome"

It would be especially appropriate if the mail man was also a ginger.

Mail-man syndrome by Your Mail Man January 18, 2010