To think about multiple negative thoughts creating a festerpool of negativity resulting in situations appearing far worse.
A festerpool of high emotions can result in riots.
A person was upset due to debts building up, their mind began to pile all theirs worries creating a festerpool of depression.
When a minor character in a film or tv series with little screen time becomes one of the most beloved characters in the show/movie. Its name originates from the character Boba Fett from Star Wars who, despite having little screen time, very few lines and a disappointingly lame death in the original trilogy, gained a cult following and is by far one of the coolest characters in the Star Wars universe.