To get crunk; Being drunk and high.
The fella's in the back and they twistin' up a philly, get silly.
And now that im straight im bout to act a fool again, get silly.
To drink; to get wasted. Silly is another term for drunk.
Your kid: "Hey guys, I stole a 12-pack of Natty from my dad's fridge. Wanna get silly tonight."
Friend: "No, I think we'll just smoke crack instead."
Your kid: "OK, save a couple rocks for me!"
"Get silly...don't stop when the beat drop, just keep shakin' it, get silly." -Sean Paul
"Got me gettin' so silly right now..." -Beyonce
"E'rybody in the club gettin' silly." -J-Kwon
To smoke pot.
Hey, after the game do you want to get silly?
Oh yeah, he smoked like six bowls and got big silly.
Where a girl holds the male body party located below the waste and does the motion done in the music video...Equivalent to a hand job.
Guy: Dude that chick is hot...Do you think she can get silly?
Guy2: Isnt that a dance
Guy: Its the motion of the dance but with a guys meat rather than the air