It is a reference to the mathematical term x.
Its usage is usually related
to mysterious events. It is largely used as a sexual reference but it can be utilized as a financial conversational tool as well. It is synonymous with plenty.
This is a slang term not usually used in professional settings.
Lady: Babe, we have x amount.
Lady Saw uses this term in her song “Don’t even stress dat” http://www.youtube.com/watch?v=nc2jr6zc9lu
Lady Saw: Don’t even stress dat, dem gal de na have x amount a kitty whe me got inna lap.
Translation: Don’t even think too hard about her she don’t have the x amount of kitty i’ve got in my lap.