Penny Press

A penny press is someone who always has to chime in and say some half-fact nonsense. They try to act smart and seem like they know stuff but, the “stuff” is worthless like a penny. Think of one of those penny machines where you put two in and one squashed penny comes out.

“She’s just a penny press, always putting in her two cents and not contributing to the conversation”
“What you’re saying is useless, stop being a penny press”