adverb. Absolutely, motherfuckingly so.
Related terms: absofucking, absofuckingnotly, absofuckinglutely, absodiddly, absonotly.
Real citation: “See asslicker kiss worthless ass on VH1’s rock show and for what SCOTT, Absomotherfucking NOTHING!”
(Diabolic, Jan. 15, 2003, http://22.214.171.124/search?q=cache:yUvFiN0dGakJ:www.metalreview.com/forum/post.asp%3Fmethod%3DReplyQuote%26REPLY_ID%3D3770%26TOPIC_ID%3D355%26FORUM_ID%3D3+absomotherfucking&hl=en)
Made-up citation: "I never, ever make a bet, because though I may be absolutely sure of something, I am absomotherfucking sure that I always lose bets. I hate my brain. Excuse me while I make a crack and grain alcohol smoothie."