the.com/pushback

means Resistance or opposition to an idea, plan, or decision, usually voiced as objections rather than outright refusal.

from A straightforward compound of push and back — literally pushing back against force applied to you. It started as a mechanical/physical term (the resistance felt when you push against something, like the recoil in machinery or aviation) before migrating into business and politics in the latter half of the 20th century to mean resistance to a proposal or decision. No hidden story here — it's one of those compounds that means almost exactly what it looks like it means.