Meaning/Usage: A slang way of telling someone to tell you what they know.
Explanation: This was seen in movies and is primarily used in informal speaking.
"You heard about that rumor already? Do tell."
"Martha and Jake are breaking up? Do tell."
"Do tell. I'm dying to know what he said about me."
A. "I heard a rumor the other day about what really happened at work."
B. "Oh do tell! I really want to know what happened."
Other Common Sentences
"I want to know."
"Please tell me what you know."