Greedflation refers to price increases not caused by increases in costs.
But this heavily charged moniker pretends that the increase in price is driven by greed, which is nonsense. Did corporate executives become more greedy all of a sudden? Where was that greed during the decades of low ~2% inflation?
It is mixing up cause and effect of course. Price is a function of supply and demand, and both of those are in turn a function of price (among other things), setting up a feedback network.
The Pandemic disrupted the supply and demand balance. Initially, it pretty much destroyed supply in in-person services. That was partially offset by remote services - food delivery instead of dining in, Zoom yoga classes instead of in-person ones, Only Fans instead of strip clubs and hookers. But nevertheless, services declined. Later, supply of goods also declined due to supply chain issues.
On the other side of the ledger, massive fiscal stimulus by the federal government made many people flush with cash. That stimulus continued long after the economy reopened. So you had more money chasing fewer goods and services. The result is inevitably higher prices. But if costs do not increase at the same rate as prices (or have longer ramp-up times) that results in more profits. Profits are, after all, the difference between the revenue and costs.
No sudden increase in greed is needed to explain higher corporate profits due to this inflation, and calling it "greedflation" is missing the fundamental cause and effect relationship.