What is cheesin hard?

"Cheesin' hard" is a slang term that essentially means smiling very widely and enthusiastically. It implies a genuine and perhaps somewhat over-the-top expression of happiness or joy. It's often used to describe someone who is grinning ear-to-ear, showing a lot of teeth, and radiating positive energy.

The term plays on the common phrase "say cheese," used to encourage people to smile for a photograph. When someone is "cheesin' hard," they're taking that instruction to the extreme.

Here's a breakdown: