From Longman Dictionary of Contemporary Englishstack up phrasal verb1 stack something ↔ up to make things into a neat pile2 informalCOMPARE used to talk about how good something is compared with something else against Parents want to know how their kids’ schools stack up against others.3 if a number of things stack up, they gradually collect or get stuck in one place Traffic stacked up behind the bus. → stack→ See Verb table
Examples from the Corpus
stack against• But now, because of complex permutations resulting from an equally involved scoring system, the odds are stacking up against Conner.• At the very least, he would have to reckon on the 21 votes in the Cabinet being stacked up against him.• He huffed and puffed-but failed to shake the growing edifice of evidence stacked up against him.• Parents want to know how their kids' schools stack up against others.• What everyone else wanted to see was how gold medal standard stacked up against professional match racers.• They got it all stacked up against you before you walk through the door.From Longman Business Dictionarystack up phrasal verb [intransitive] informal to have a particular performance when compared with something againstHow does their product stack up against our own? → stack→ See Verb table 