A word used to describe someone who is both grumpy and cranky. The "i" instead of the "y" is used to express that it is used in first person at all times. To use it to describe the person you are talking to it can be used as granckyou and in the third person it is said as granckhee and grankshee.
I am feeling grancki, you better watch out!
Bill, you are really granckyou today!
Loretta is feeling grankshee today.
Todd is feeling grankhee today.
"It looks like someone woke up on the wrong side of their mom this morning!"
"It's not his fault that I'm grancki."