What? You suck your thumb?
5 seconds sound clip from the Madagascar movie soundboard.
You can hear this line at 00:16:30 in the Blu-ray version of the movie.
Quote context
[...]
- My sweet, juicy steak. You are a rare delicacy.
- You know how I have that bladder infection and I have to get up every two hours?
- Well, I got up to pee and looked over at Marty's pen...
[...]