grow a set
v. phr.β Β«Look, WTR, youβre going to have to grow a set. Youβve gone from stare-and-glare to nodding, but you wonβt get anywhere else if you donβt have the balls to walk up to him and introduce yourself.Β» ββSavage Love” by Dan Savage Village Voice (New York City) May 16, 2006. (source: Double-Tongued Dictionary)