(n) the ultimate of all insults, for which there is no comeback. Only to be used for most hated enemies. Note - will inevitable result in escalation to violence.
"...see you saturday, you shanazarillashazbiznatchgaziza!"
A shit, feces, waste product from the bowels, crap.
"That lunch was delicious, thanks George."
"No problem Ben. Would you excuse me? I need to drop a major nugget."