make mouth water
make (one's) mouth water
1. To cause one to salivate or feel hungry. Just the thought of having a big seafood dinner tonight makes my mouth water. The smell of the burgers on the grill made Jake's mouth water.
2. By extension, to cause one to feel happy or excited, usually with anticipation. A business opportunity like that is enough to make anyone's mouth water!
make someone's mouth water
to make someone hungry (for something); to cause saliva to flow in someone's mouth. That beautiful salad makes my mouth water. Talking about food makes my mouth water.