
Or as you may know him,
Dave from AT&T Customer Service.
The Big Bang Theory Season 3, Episode 4

...just to complain
about their CUSTOMER service.
The Big Bang Theory Season 3, Episode 17

Yes, but at this point,
pretty much any CUSTOMER does.
The Big Bang Theory Season 7, Episode 13

Which is crazy since rock and roll
is all about good CUSTOMER service.
The Big Bang Theory Season 9, Episode 10

He could be the first CUSTOMER.
Breaking Bad Season 4, Episode 5