someone who is mysterious or does things on the side or in hiding
"I'm callin u out cuz ur shady mcgrady but ur jockin my style..."- "Like Me" Joy Tolentino and Skuba
A person, persons, or object that appears or behaves in a suspiscious or insconsistent manner.
An incident which can be described as creepy or odd.
I came back from the bathroom and Dave was looking through my desk. That guy's Shady McGrady.
There was a green piece of cheese on the floor. It was Shady McGrady, but I was so hungry that I ate it.