Wiktionary
push back
n. (alternative spelling of pushback English)
WordNet
Usage examples of "push back".
He had to let Talbot push him and push him and push him until he was ready to push back in all his unadulterated fury.
The pain in his stomach was returning, rising, a slowly building wave he could no longer push back.
Dekker had no idea how big the carrier was, but it had a solid grip on them, and they could move around now, get what they needed before they sounded the take-hold and shut the rotation down for the push back to R2.
He wanted to hold his arms out sideways and push back the flanks of the tunnel to give them space to breathe.