An omniword is a word that can be used anywhere and/or can have any meaning. It can be used to replace a word for various reasons, ie when the correct word is unpalatable in the present company.
is a word that can be used anywhere, its an omniword. For example What are you looking you mough?
Or when considering the ability for an omniword to replace an unpalatable word - I bet you like it in the mough
? Or she's total mough
, both occasions replacing cunt