Slang meaning happy/glad/funny can also be used to replace a curse word if that word is being used in a positive connotation. The second p is added for extra emphasis.
I’m so capy that my bestie is here.
I caping love their dress
I am so cappy right now!!!
Don’t be sad be cappy
That comment was not capy.
“The fast food employee was a total capy when he didn’t charge me for the drink.”