What you sarcastically quip back at someone who is bemoaning da fact dat he wasted ten minutes of his life doing something dat turned out to be useless.
Dude #1 (having just super-briefly talked to customer-service after waiting an absurdly long time to get connected): Man, what an insufferable delay just being stuck on hold --- THAT'S ten minutes of my life that I'll never get back!
Dude #2: ...aaaand that's ANOTHER ten SECONDS that you'll never get back from COMPLAINING about it!
Something that a lot of people don't mean. A word that a person should never use because it's not true! Let's say if a person says I'll never leave you, they'll leave you one day.
A meme phrase associated with mute characters typically said only in earshot of one person, as nobody will believe they spoke and if the other person says they spoke they'll just look crazy
Mute Character: They'll never believe you.
Joe Schmoe: HOLY SHIT YOU HAVE VOCAL CORDS???