This statement is used——sometimes humorously, sometimes sarcastically——to say, “I’m not going to tell you,” or“I’m not going to answer that question.” “I know the answer to the riddle but my lips are sealed. This statement is used—sometimes humorously, sometimes sarcastically—to say, ”I’m not going to tell you,“ or”I’m not going to answer that question.“ ”I know the answer To the riddle but my lips are sealed.