When a girl gives a guy a penny as a token of friendship, but the guy really is looking for more than friends, and is let down by the girl.

When you eat dirt for the first time and leave your family to build a shack in the woods

a penny that is put in a machine that imprints it with a word or design. Generally it is given as a gift from one person to another, usually boy to girl or vice versa. It generally signifies eternal friendship but nothing more, like a relationship. The receiver usually accepts the gift but then enters a state of depression behind closed doors because he wants to have a relationship.