Phrase.
Definition dependent on context.
Typically means,
"You're paying for the
telephone call, so":
1. "I'll listen to what you say,"
2. "say what you want," or
3. "place the call if you think it's
necessary."
The phrase is a relic from a period when telephone calls placed from a coin-operated pay phone cost $.10 (a US dime).
1. "You're calling me on my home phone at night, but, hey, it's your dime, so speak."
2. "Dude -- you should call
the radio station and tell the DJ about your
spring break story. They won't
cut you off -- it's your dime."
3. "If you need to tell your folks about the accident...Well, it's your dime."