If you popped like 8-15 pills would you die?

Depends on what kind of pills. Asprin, no. Nitro, yes.

it matters what kind of pills and how much each pill contains.

If it says on the bottle how many you should take in one serving then follow that, if it already happened without this advice...see a doctor as soon as you can.

It certainly depends on WHAT KIND of pills. There aren't that many pills prescribed these days that would kill you. HOWEVER, you could certainly do brain damage, or go into a coma and have to live in a Total Care Facillity in diapers for the rest of your life. But the most COMMON or PROBABLE effect would be damage to your liver, and that's NOT good. Even 15 TYLENOL could hurt your liver. So it really isn't a good idea!!