Top definition
very similar to "shut the fuck up" but is said in more of a blurting out, just cant take it anymore, fit of rage fashion. It is more a use of sounds vs words.

Pronounced with subtlety, and under your breath as a single word..

sh-t-th-f-ck-up.. but quickly.
"shtthfckup"
by m.rix March 31, 2009
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