Depending on context it can mean for a gang so throwing up 4s is often used by gang members/affiliated members. Often meaning for the (gang the person is in or affiliated with).
*taking picture person Throwing up 4s* what gang are you reping? Im reping bloods. Ohh yeaaaaaa for the bloods!!
Did you see Polo G throwing up 4s in his ig pic?! I didn’t know he knew Mollie!
It's when your madly in love with Mercedes
Look he's throwing up 4s I think that's her boyfriend!
It is when you are madly in love with Mercedes
Wow he's throwing up 4s he must be moe's boyfriend
Throwing up 4s shows how many willys that u put in your ass
“Oh look! Ivan posted a Bereal throwing up 4s, Thats how many Willys he likes in his ass!”
you pull so many bitches and have hella rizz
Quandale was Throwing up 4s because he has rizz