used to describe anything (situations, people, objects etc...)that is not as good as something else - but not to be taken super seriously / used in a joking way /
EXAMPLE: "I want to listen to the radio but all they play is crapnit"
"She is just a crapnit - but she is cool - Call her up and see what she is doing tonight"
Dude, Kieran was so drunk last night, I had to save him from a hippo - she was definitely carrying a sweaty cranitch, I could smell it from the other end of the bar!