When your mate says something ill (strange, funny or medically related comment) and you think that it would be a good idea for them to sing that word or phrase really loudly, you shout, SING THAT!! (it has to be said in an ill high pitched voice too). If your mate fails to sing the word or phrase, a common follow up is, SING IT!
Andrew - 'granulomatous inflammation'. Pete - 'SING THAT!' Andrew - 'GRANULOOOMATOUS INFLLLAAMAAATION!' Pete - 'you're ill.'
by the ill man December 28, 2011
1. A well-known prison located in eastern New York State, along the Hudson river. The base for such phrases as 'up the river' (as it is located up the Hudson river from NYC) and 'the big house' (because it's a... big... place.).

2. A popular nickname for Ossining, NY, the town in which Sing Sing prison is located.
"Hells no! I'm not gonna do that! I don't want to end up in Sing Sing!"
by Deus Ibi Est April 30, 2006
sing sing is either the prison or the town outside it, also known as O town . They got a mad famous prison and shit there.Good place to party if yuore in Westchester.

Where u from? SING-SING!!
by ZYSHONN April 18, 2006
(verb) The submission of clandestine and sensitive information that was originally intended to remain as such; ratting; snitching; narcing; "telling on" someone or some people.
If ever Betsy gets put in the interrogation room that hog bitch will start singing on the whole crew just to save her own ass. Damn is that bitch ever a cutthroat.
by Nikki Stixx February 4, 2020
A deranged mad-scientist from Zaun who instills maximum tilt into his enemies as they attempt to chase him through his cancerous poison gas. Tilt is amplified via the use of laugh-spam and mastery spam as well as implementing Rylai's Crystal Sceptor into his kit.

Singed created Warwick and pissed him off.

Never chase Singed. He will laugh at you and kill you after you lose half your HP to his poison.
Singed can go 0-10 in lane and still shit on your team fights.
Singed is fucking OP dude. He just runs around, unkillable, spamming shit and taking turrets. I fucking hate Singed.
by ThatMilkshake May 7, 2018
"Singative" is like "talkative" or the newly founded "textative."

"Singative" refers to the feeling when someone wants to (or actually does) start singing (either randomly or because they have a reason for doing so).
Jake: Hey dude, why is Melody singing in the middle of the living room? I mean, she's just terrible!

Ryan: Yeah, she does suck at singing, but I can't stop her. She said she's in a singative mood.

Jake: Oh brother!

Ryan: Tell me about it! **Rolls eyes**
by Luke J. Hayslip July 13, 2009
Abbreviation for 'Side Minge'
by Tylers88 November 21, 2016