cheese up

verb2

1. •
   (slang) To add cheese to; make cheesy or cheesier.

   • "No, just get over here. You need to try this one!" she exclaimed as she cheesed up a chunk of bread with one of our blues. Angeline stuffed the open faced mini-sandwich into my mouth […] — 2005
2. •
   (slang, figurative) To smile widely; to crack a huge grin.

   • I cheesed up at his perfect fucking face. — 2022