Booyakasha!

 

Booyakasha is the catchphrase that is common among the Turtles.

According to Greg Cipes in an interview, "Booyakasha!" means "High Glory and love to the very moment."

So when Mikey or any of the turtles say it means celebration to the hour or to deliver a final blow to an attack.

Trivia

• The original catchphrase was the infamous "Cowabunga".

• The catchphrase is said by Fugitoid in the episode The Arena of Carnage, as Mikey eats, he tried to say the words, but was too busy chewing, so Fugitoid just yells it for him.