For example: Scrum, but retrospectives are a waste of time so we don't do them here (or keep them as short as possible, because no one cares about your feedback anyway); and you can estimate the story points, but the management has already decided that the deadline for these features is one month, so your choice is really which ones you want to implement during the first two weeks, and which ones during the second two weeks, now go ahead and do your little Scrum poker ritual.

Meanwhile, on the Scrum training they tell you that the retrospective is the most important part of the Scrum; that everything else can be dropped if necessary but you must keep the retrospective at all cost. Then you get the certificate, and then the management tells you "that's nice, but we do it differently here".

Management wants the buzzwords, and perhaps some of the rituals, but not any actual change. You are free to do Scrum, as long as you only select the parts convenient for them, and remove everything inconvenient for them. The same would happen with any other methodology.