Best definition
X Amount
A term having Caribbean origins particularly Jamaican.
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.

Guy: So do we need any thing for the party tonight.

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.