simma down 

a common phrase passed around at many instances of the African American family meal

grandma: “y’all be ready to eat when the collard greens simma down”
uncle: “these kids betta simma down right quick while im watchin’ the game
bro: “yo- just simma dog, im on the phone with my honey”

simma down by Nikki November 4, 2004

Down Simba 

Expression used when someone is going off on a conniption fit. The rage is depicted as the size of an elephant or having the rage of a lion (ie. Simba from Lion King).

Girl: I cant believe that f-in m-fer cut me off. What the eff is wrong with his f-in lane?!?!?!

Guy: Whooooaaaaaaa......... down Simba! He is a 1/2 mile in front of you!!

Down Simba by Urban Articulator March 24, 2010

simmadown now 

verb- To calm down, quiet down, or keep it down.

1st and ten SIMMA takes the snap drops back fires DOWN in the endzone for a touchdown NOW cmon hits the extra point. It's SIMMA to DOWN followed by NOW and it's SIMMADANA!!

simmadown now by CarolinaGuy May 16, 2003

simmadown now 

slang for simmer down now,also means calm down now

Barry!Simmadown now!

simmadown now by Matt February 10, 2003

simadownnow 

shut the hell up

you better simadownnow.

simadownnow by simba June 30, 2003