Adjective
lean and mean (comparative leaner and meaner, superlative leanest and meanest)
(colloquial) efficient because of having nothing in excess of what is needed, and single-minded in one's objective
He's a lean and mean fighting machine.
Tough times helped many commodities traders become lean and mean through consolidation, mergers and cost cutting. All that excess supply has been sopped up. Jim Rogers
So you are lean and mean and resourceful and you continue to walk on the edge of the precipice because over the years you have become fascinated by how close you can walk without losing your balance. Richard Nixon