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.
Ripley - "I say we take off, and nuke the entire site from orbit. It's the only way to be sure"
Fuckin' A means: 'Absolutely'. Or 'Damn straight'. To make the same statement, Aussies say "Bloody Oath" (or maybe 'kern Oath' if my sources are correct). There is no need to parse it to try to figure out what the 'A' means. It just is. All this 'awesome' and 'can be either positive or negative' comment is crap.
Can be said in good or badcontext to indicate a positive or negative reaction (respectively), but no matter how it's used... it still means "Fuckin' Awesome"
"fucking affirmative" derived from military radio communication. One would say affirmative but in the heat of battle "fucking affirmative" then "fuckin a"
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.
We have a Zoom meeting in a few minutes and I’ll probably go pajama casual.