How long you gonna be mate?
When is the food ready?
How far away are you?
How Long will this take?
Usually, 10 minutes is a gross underestimate and can actuallly mean anywhere from 30 minutes to 4 hours
Person 1: How far away are you?
Person 2: O, only about 10 minutes?
Person 1: Cool I'll see you there
Person 2 only just woke up
Angry diner: When is the food ready?! it's been 30 minutes already!!
Waitor: Yeh, in about 10 minutes?
Waitor tells the kitchen to start cooking
Dealer "10 minutes. I'm not far from there now."
30 minutes later
Dealer "sorry about the wait...how much you want?"
although "10 minutes" represents one user's chosen term, each couple must come up with their own phrase that is sufficiently commonplace to not raise suspicions when potentially used frequently
You (on phone): "No, that's not at all what I'm saying."
Girlfriend: "You're acting very weird, there must be something else. Did you sleep with someone else?"
You: "Oh, I'd say in about 10 minutes."