Question

You can make as much noise as you want, but I DRAW THE LINE AT fighting. / It's hard to keep young people under control, but you have to DRAW THE LINE somewhere.

Accepted Answer

IDIOM: to set a limit at something; to decide when a limit has been rerached

Front	You can make as much noise as you want, but I DRAW THE LINE AT fighting. / It's hard to keep young people under control, but you have to DRAW THE LINE somewhere.
Back	IDIOM: to set a limit at something; to decide when a limit has been rerached

Draw Line Limit Make Noise I Fighting Hard