You fooled me with that goat at the petting ZOO,
you will not fool me again.
The Big Bang Theory Season 8, Episode 7
I thought it smelled
like a petting ZOO in here.
The Big Bang Theory Season 10, Episode 8
Should we get lunch
or you wanna eat at the ZOO?
The Big Bang Theory Season 10, Episode 21
What emergency happened at the LA Zoo?
The Big Bang Theory Season 10, Episode 17
...the order is petting ZOO first,
then buy vegetables.
The Big Bang Theory Season 8, Episode 24