A Funny Line From “Paul Blart”

I just watched “Paul Blart: Mall Cop”.  Overall the movie was about what I expected:  kind of dumb, but in a good, enjoyable way.  The movie wasn’t super funny in general, but there were a few great moments.  One of them for me was when Blart has borrowed the cellphone of his friend’s teenage daughter, whose boyfriend keeps calling the phone.  Once the boyfriend calls and says, “Peanut Blart and jelly!!  So good to hear your voice!”  Along with its delivery, I thought this was hilarious.

But why was this funny?  I’ve been thinking a lot lately about what makes something funny, since I’d like to be funnier myself.  I have a few disorganized thoughts on this, but I’d love to hear anyone else’s thoughts on what makes this funny.