I might be described as an “economic conservative” as, in America, that means economic liberal.
BTW “fiscal conservative” sometimes means favoring higher taxes in order to balance the budget as opposed to lowering taxes in order to balance the budget by spurring economic growth (i.e., it’s the opposite of “supply-sider”).
I’ve never heard the terms fiscal conservative used as the opposite of “supply-sider”. And using liberal in the old definition is just a confusing term to use.
I am a lower taxes, supply-sider myself.