1. The boss is up to the eyes in work.

2. He has been up to the eyes in work recently.

3. The day was cold, with flurries of snow and people were muffled up to the eyes.

4. Fake smiles involve only the mouth, while real smiles—called Duchenne smiles by psychologists—reach up to the eyes.

5. Try giving a dreamy look at their mouth while they are talking and then roll up to the eyes - so very flirty !