"we better warn them"
Similar to the word "shee," which is an alternate form of "shit."
ImAwesome69: bro like 6 hours
ImAwesome69: shee, inorite
Bob: dude look at that girls ass
Joe: dems thats some fine booty
Bob: shee, inorite
"I have mad gambling dems because i spent all of my life's savings away."
DEMS in relation to things:
"My car's engine light keeps turning on, and my brakes suddenly aren't working," would suggest someone has car dems.