grow a set
v. phr.— «Look, WTR, you’re going to have to grow a set. You’ve gone from stare-and-glare to nodding, but you won’t get anywhere else if you don’t have the balls to walk up to him and introduce yourself.» —“Savage Love” by Dan Savage Village Voice (New York City) May 16, 2006. (source: Double-Tongued Dictionary)
Further reading
Ever thought there ought to be an English word for this or that phenomenon? Such holes in the language are called lexical gaps. A listener in Ontario, Canada, notes that English lacks a single word for the mistake voice-to-text programs make when...
Nancy Gabriel from Ithaca, New York, recalls her father’s no-nonsense responses to minor injuries when she was a child: After making sure she was really all right, he’d say, It’s far enough from your heart; it won’t kill you. Other times he...