Plug it with rocks and ice.
Flood it and let it freeze.
Game of Thrones Season 4, Episode 7
Has your mucus PLUG popped out?
The Big Bang Theory Season 11, Episode 16
looking at the little PLUG
where the ashtray used to go?
Breaking Bad Season 5, Episode 11
"mucus PLUG" again.
The Big Bang Theory Season 11, Episode 16
So let's PLUG in our 9.8 meters
per second squared...
The Big Bang Theory Season 3, Episode 10