Possible Clues:

• Cool beans or warm fuzzies
• "Going to the dogs," e.g
• "Talk turkey," e.g
• Ten thousand I had, in a manner of speaking
• "Cat got your tongue?" e.g
• 'In a pickle,' e.g
• Language used by a people or group
• Jargon
• "Up the creek," is one
• Nonliteral phrase