I'll fly you

I'll fly you! lets someone know that you intend to cut sick on their arse and smash their face in.

I'm gunna fly you can also be used for this purpose.

"Look mate, if you don't get the fuck outta my face. I'll fly you, you mother fucker!"

or

"If you don't shut the fuck up, I'm gunna fly you."

or

"I'll fly you fucken windmill style, if your not careful"

Look under W for the definition of windmill style.