sack up v. to become bold, courageous, or forthright; to nut up, man up. (source: Double-Tongued Dictionary)
sack up v.— «I heard the term “butch up” while watching “Die Hard With a Vengeance” last night.…I have transgressed the term to be more encompassing to be used more like “grow some balls,”...
sack up
v.— «I should probably just sack up and be honest with myself and with her.» —by Rob My ‘Other’ Blog Aug. 10, 2004. (source: Double-Tongued Dictionary)
sack up v.— «My only response to diablo is to sack up and grow a pair.» —“Re: Love and Death” by maszakj@pell1l8.alleg.edu (Jonathan Maszak) Usent: alt.romance.chat Mar. 11, 1994. (source: Double-Tongued...