A person, who acts in a special way and is not afraid to do so. Usually a small, cute, person who is very happy and can make you laugh whenever they want to. Also some one who is very fun to be around and acts in the silliest way possible.
sillysillygurll pranked me the other day, sillysillygurll is obsessed with nicki minaj. “do you like sillysillygurll?” “of course i like sillysillygurll, who doesn’t??”
This is a name or title given to a confused individual in conversation. This name is often given by an individual who is informed and knowledgeable of the subject to an individual who misinformed or ignorant of the subject. Silly Sally is often used in replacement of dumbass.
Jason says, "Hey guys, you want to go to a bar and have a beer?" Jason's friend replies, "Jason, you Silly Sally, your only 16. You can't even get into a bar."