
...an improvement
on the existing mediocre STOCK.
The Big Bang Theory Season 1, Episode 15

I put very little STOCK in it myself.
Game of Thrones Season 7, Episode 5

Good STOCK.
Breaking Bad Season 2, Episode 12

...and other rolling STOCK
from the 1880s to the 1930s.
The Big Bang Theory Season 4, Episode 6

You know, STOCK characters,
The Big Bang Theory Season 5, Episode 5