An embarrassing and mythological maneuver one claims to had performed during and altercation in which he/she/questioning had unquestionably lost but cannot accept the loss and thus claims to had performed on the true victor in a pathetic display of denial .
A arm barn is the southern term for a circle jerk. Where a group of good ole boys get together to jerk each other off in a circle. An arm barn tends to be more rough than a circle jerk on account of all participants having blue collar jobs, thus leading to hands that know a hard day's work.