Obviously you haven't spent time hanging around US college campuses or your would be more au fait on your Marxist ideology:
The class of people in bourgeois society who own the social means of production as their Private Property, i.e., as capital. See The Communist Manifesto for Marx and Engels' description of the historical role of the bourgeoisie.
Sorry, I made a slight mistake in that post. I meant to write “petit-bourgeois” instead of “bourgeoisie”. Good catch.