What's this ?

Here is a word that we use here in Southern Kentucky. Can you read it? My father inlaw heard one of my friends say this so he carved it out on a stained board and gave it to me as a gift. I have it hanging on the wall in my man cave. Let me know if you can figure it out. So far, nobody has got it right. Here it is!

IFICGOKILSUMPIN

lET ME KNOW IF YOU CAN FIGURE IT OUT!