A loving affectionate term to be used only with close friends. Means that the other person is being silly and funny.
when asking someone how to use the phrase this was a response:
ME (3:51:10 PM): what would be an example of a way to use silly boob
#$%^&* (3:53:40 PM): you're the one that calls me a silly child molester that jerks off while being an idiot
#$%^&* (3:53:47 PM): you should know how to use it.
#$%^&* (3:53:50 PM): you silly boob
theres a perfect example