upstage

remote in manner

“he was upstage with strangers”

at or toward the rear of the stage

“the dancers were directed to move upstage”

move upstage, forcing the other actors to turn away from the audience

steal the show, draw attention to oneself away from someone else

“When the dog entered the stage, he upstaged the actress”

the rear part of the stage

treat snobbishly, put in one's place

of the back half of a stage

“she crossed to the upstage chair forcing the lead to turn his back to the audience”