When you decide that a reaction is actually stronger than it first appears. This word is based on the fact that you start to say "Shit" but then decide a stronger word is necessary, thus the "Fuck".
guy 1: Dude did you study for that huge test?
guy 2: Sh-fuck man...no I forgot!
Sh’Tari is a lovely guy who is always gonna be there for you and he will never leave ur side and he’s also a very caring person that just wants to be loved,and he’s also freaky and loves hugs ,watch out u might even fall in love with him and he’s friends with everyone.
A sh-bust is basically an act preformed when you have finished doing a shit. You then have a wank sitting down toilet and bust into it as if you were pissing all over your poo you just had.