What does muck losing mean in texas hold-em poker?

Question

What does muck losing mean in texas hold-em poker?

Answer 1

It means you throw your losing hand back into the deck/discards without showing everyone what you had.

Answer 2

You don't show your cards when you lose - you muck them.

Answer 3

Mucking your hand means that you've discarded your hand because another player (who has shown their hand, most of the time) has a better hand than you & you don't want to disclose the cards you had.