tap out
v. phr.— «Once, in a match with Kazushi Sakuraba of Japan, Mr. Gracie refused to “tap out,” or submit, despite being in an iron hold. Mr. Gracie let his own arm snap.» —“A Kinder, Gentler (but Not by Much) Brand of Fighting” by Anthony Ramirez New York Times Oct. 21, 2007. (source: Double-Tongued Dictionary)