Also known as "Pump and Dump" a "Booyah Screwyah" refers specifically to Jim Cramer speaking favorably about a security only to have his friends who work in finance unload or take a short position against the very same security. "Booyah" is Cramer's slogan to signify enthusiasm.
Cramer: I say Nividia is a buy buy buy!
Joe: Damn it! Cramer is pumping Nividia again. I bet it drops next week... another booyah screwyah.
an exclamatory statement, often said when someone is extremely overjoyed. Often people do a hand movement simultaneously as they say 'Booyah'(clinching fist and thrusting their elbow downward vertically)