sentence enhancer. Used to express anger, fear, happiness, etc. Just like the F word. The difference?
well... some drunk guy was texting me and he attempted to tell me to "f*ck you you stupid c*nt" but instead told me this: "ay fucak you yuo stupf cint"
ahh, what the fucak man?
This is fucakin bull!
I'm so fucakin happy!