
Which Archimedean solid
has 20 REGULAR triangular faces...
The Big Bang Theory Season 8, Episode 2

Not really. Apparently grief
can make one less REGULAR.
The Big Bang Theory Season 10, Episode 23

Do you want the
REGULAR peas or the Le Sueur?
The Big Bang Theory Season 3, Episode 10

I'm just a REGULAR guy,
The Big Bang Theory Season 11, Episode 15

Yeah, it's a REGULAR Manhattan Project.
The Big Bang Theory Season 2, Episode 22