Bedaleing means goofing around, it's used when you don't know any other word to use in a situation where the other person is so goofy and silly, you forget the word you were going to say completely and instead say "bedaleing".
Ian Bealing is a term used when you have to hold in a laugh/squeal/snigger in an awkward situation such as at work when its deadly quiet or at a funeral and as a result of trying to laugh quietly or not laugh at all you end up pulling the infamous Ian Beale face.
I'm totally Ian Bealing right now
Have you seen Jessye shes Ian Bealing at a joke I told her!