You found it. It's the sound of a cat
being run over by a LAWN mower.
The Big Bang Theory Season 2, Episode 15
If I mow the LAWN, can I have my allowance?
The Big Bang Theory Season 8, Episode 1
...we had an inflatable Santa Claus
with plastic reindeer on the front LAWN.
The Big Bang Theory Season 3, Episode 11
WOMAN [ON RECORDING]:
Get a thicker, fuller LAWN
in less than six weeks.
Breaking Bad Season 2, Episode 10
Why, because they won't get off your LAWN?
The Big Bang Theory Season 8, Episode 4