When a tycoon or boss takes money, preferably in 20s, 50s, and 100s, and "makes it rain" on unsuspecting bitches for no apparent reason other than showing their boss and/or tycoon status.
Hey baby have you ever experienced a tycoon shower? (commences to showering girl with money).
A boss who is so unmistakenly tycoonin that both sides combine and make the person a boss tycoon.
"Dude this cat right here is a boss. He tycoonin hard."
"Na, man he is a boss tycoon."