Like A Turtle Do is a catchphrase said commonly by Michelangelo.
TCRI - It was first mentioned when Leonardo asked Mikey if he could hold his breath for a long period of time.
Mazes & Mutants - Michelangelo makes fun of Raphael, who had a turkey head, saying "Like a Turkey Do".
Metalhead Rewired - Michelangelo said it and its abbreviation when demonstrating how to reveal a portal to a Kraang hideout.
Return to New York - Donatello said it after opening a locked passageway.
- Michelangelo would often abbreviate the catchphrase as L.T.D.