на взводе

быть на взводе  {v.phr.}

 {informal} to psych (up/out),  {slang} to screw.

~ be blue in the face

To be highly emotional or nervous; be prepared to smt., or to action; be bery angry or disappointed.

на взводе  {adj.phr.}

high(ly)-strung, nervous, wrought-up; strung-up  {Brit.}.

 {literally} having one's gun cocked (?).