crack in the crack
n.— «“So if an officer has probable cause, they can perform a strip-search?” Whaley asked. “A reasonable officer would believe that’s constitutional,” O’Hara replied. She used a street term—”crack in the crack”—to describe where suspects sometimes hide drugs.» —“Judge hears case of strip-search” by Karen Dorn Steele Spokeman Review (Spokane, Washington) May 24, 2007. (source: Double-Tongued Dictionary)