Raoul was an adventurer of the liquid mind. The phrase was invented by his mother because she hated when people called him a drunken lout. She created an entire imaginary world around the idea that he was a mendicant poet and philosopher.
In this world he sat drinking his muse juice and after a series of long quiet meditations he would share his wisdom with the world. Usually something along the lines of, “Screw the mayor!”
Of course the proles, as she called his drinking buddies, missed the subtle sociopolitical message behind the words. Only she recognized his unique brilliance.