Ricin.
It's an extremely effective POISON.
Breaking Bad Season 2, Episode 1
What was l supposed to do,
POISON myself?
Breaking Bad Season 4, Episode 9
if I told the judges
you'd bought a POISON called the strangler.
Game of Thrones Season 4, Episode 3
They followed me across the POISON water.
Game of Thrones Season 3, Episode 1
If we POISON the critical
thinking faculties of children
The Big Bang Theory Season 5, Episode 12