Say when

Pro Tip 1/3

Politeness Marker

Indicates you're being considerate by allowing them to control the amount they want.

I'm adding sugar to your tea; say when.

Pro Tip 2/3

Common in Service

Used by someone providing a service, like pouring wine or giving you a serving of food.

Tell me when your plate is full enough.

Pro Tip 3/3

Requires Immediate Response

You should respond as soon as you want the person to stop without delay.

I'm grating cheese on your pasta—say when!