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.
Synonyms for harden the fuck up
On this page, you will find 30 slang terms related to harden the fuck up. Some of the top words include: Pearls, Gwack em', THE WAND AND THE HAIRY SACK OF MAGIC, jock, juicebag, and 25 more.