A jelly bean muncher is someone who enjoy providing oral pleasure to the rectum.
My buddy did acid yesterday and talked about how he liked eating jelly beans so much. I didn't realize he was a Jellybean Muncher
A Jellybean Jar is a euphemism for the ass. The term originated in Western Kentucky and many teenagers in those areas use this phrase.
Damn, she's hot. I'm jealous of who she lets reach into her Jellybean Jar.