Mexican stand-off Definition

1. A stalemate or the condition of being in stalemate.

Thesaurus: delay, pause, impasse, stalemate, deadlock, dead end.
2. rugby.
A half-back who stands away from the scrum and acts as a link between the scrum-half and the three-quarters. Also called fly half, halfback.
Form: stand-off half (also)

A set of circumstances where someone has no opportunity of self-defence.

colloq
A situation of deadlock, especially one where none of the parties involved stands to benefit from the lack of progress.