The movie is called Fun. It was made in 1994 and has Renee Humphrey in it, which is the Mallrats/ Jay and silent bob connection.
I saw it at the cinema when it first came out, but remember little about it except it bored me. Something about two girls palling up and deciding to murder an old lady. And it was arthouse, which you can tell by the fact it is black and white. Clerks was black and white. At least that made me laugh.