That's not how metabolists work at all, someone with a "fast" metabolism will actually get fat quicker because they extract more stuff from their food before they poop it out whereas people with a "slow" one will just poop it out barely digested.
Most people with a "fast metabolism" just have one big meal per day and then eat nothing the rest of it so it looks like they're eating 10 hot pockets for every meal, but in actuality, they just have the sweet spot of high satiety and a low "feeling of fullness" trigger.
That's not how metabolists work at all, someone with a "fast" metabolism will actually get fat quicker because they extract more stuff from their food before they poop it out whereas people with a "slow" one will just poop it out barely digested.
Most people with a "fast metabolism" just have one big meal per day and then eat nothing the rest of it so it looks like they're eating 10 hot pockets for every meal, but in actuality, they just have the sweet spot of high satiety and a low "feeling of fullness" trigger.