To tell someones to 'fuck off' or 'go away' hence 'fuck away'. Used by a group of people consisting of James Gary and Timo which tend to make up stupid things like that a lot
Bob: can i have a bite of your apple pie
Jim: no, fuck away bob, you cannot have a bite of my apple pie
When due to situational circumstances, or in respect to developing events, the outlook is bleak, expectations are dashed and/or an undesirable outcome is achieved.
You better get upstairs and turn off the oven if you don't want to fuck away a whole pan of brownies!
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.