(a) Anal rape (either literal or figurative).

(b) A very bad situation (i.e. nothing is going as it should). See shitstorm.
(a): Did you hear about the new health care bill that President Obama just signed? America just got bung-fucked.

(b): After receiving classified orders from President Barack Obama to disarm and form a human shield as the new Iraq counter-insurgency's primary tactic, Senior Commander Gen. Odierno mutters "Who's in charge of this bung-fuck anyway?"
by TheSovietCollossus March 27, 2010
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