coined long ago for reason unbenownst to god fearing renaissance men, shitting fuck is not only a sexual act involving feces. it is employed it situations of extreme gravitas, and is commonly found to be the most hilarious explicative amongst people from india.
(to deaf kid): shitting fuck!(while waving)
deaf kid: oh hello!
god:oh no, i was just hate fucking my girlfriend and she had an asthma attack, shitting fuck!