I was watching an SNL clip, Meet Cute and I couldn't understand their first dialogue.
Two people ordered the same soy coffee with latte milk.
Guy: That's crazy. Nobody ever gets my order.
Girl: Order up!
Guy: We're going to need a bigger cup!
"Nobody ever gets my order." Does this mean that no one orders the "Soy coffee with latte milk" like him or no one has ever grabbed the coffee mistakenly, which he ordered?
What's the meaning of "Order up!" and "We're going to need a bigger cup!"?
I'm trying to understand this scene but I don't get it.