자마자 먹다

eat it the moment it's ready

-자마자 means 'as soon as', and every line here attaches it to food: 이거 나오자마자 먹어야 맛있거든요, 'this only tastes good if you eat it the second it comes out'. It is used to lay down a small rule about the right moment to eat something — straight out of the kitchen, first thing after waking. Nothing about the phrase is fixed; -자마자 attaches to any verb, but this pairing is a food-video staple.

Register: casual, food talk