Chaviar

A caviar substitute for the masses | the lower echelons of society (if you consume it on a regular basis).
i.e. Branston Pickle

A use of the derogartory "Chav" to denigrate that which would be considered by a "Chav" to be an ostentatious food or that which is presumed extravagant by those of a supposed lower social standing. For example:

Rupert: "Victoria does assert incessantly about humous and toasted pita bread."
Winston: "Quite agree'd Rupert, it really is such Chaviar, she is so lower middle class."