1) Phrase whose meaning could be paraphrased as: "stop being a fucking pussy and act like you have a fucking pair of balls" (or something to that effect). Often used in sports.
Chopper: "This is John. He spends an hour a day doing his hair. You're also a DJ aren't you mate?"
John: "Yeah."
Chopper: "Well, John, why don't youfucking harden up?"