It's a bagel, you could see the bagel hole in the skit.
Apparently Correcting Jon Stewart
2010-02-18 00:11:56
Unknown
It's a bagel not a hamburger you moron... and it's a bathroom wall...
Jon Stewart
2010-02-17 17:17:51
Unknown
Yeah, that's the number I scribbled on my whiteboard in my 'hamburger puppet' skit on the Daily Show. The 555 prefix is unused for any outbound calling and is an information prefix dumbaS$.