Sl. to tell all; to confess. I had to spill my guts about the broken window. I didn't want you to take the blame. Mary spilled her guts about the window. She confessed that she was trying to shield Bob.
to tell secret or personal information She thinks you should share such things only with your family, and not spill your guts to every stranger you see.
to tell someone all about yourself, especially your problems Why do people take part in these shows and spill their guts on camera in front of a studio audience?