When things are strangely going too well, that you feel that something bad is going to happen.

Strong exclamatory agreement, often to an unusually concise or precise statement or proposed course of action.

This is the correct spelling - beware the overformal 'fucking a', taking time to pronounce the g is a profanity faux pas and de-emphasizes the strong expression of agreement - you might as well say "jolly good show", queerbait.

Also beware dropping the apostrophe for the omitted g, just because we're using profanity doesn't mean we need to do it like an illiterate.

"Fuckin' Awesome"

Can be said in good or bad context to indicate a positive or negative reaction (respectively), but no matter how it's used... it still means "Fuckin' Awesome"

Having butt sex.

"fucking affirmative" derived from military radio communication. One would say affirmative but in the heat of battle "fucking affirmative" then "fuckin a"

A useful phrase when a friendly conversation has reached a lull.

1.Used to emphasize a word or phrase.
2.Can be also project different emotions.
3.Can be inserted between words or syllables.
4.Possibilities are endless.