To get revenge on (someone); to resolve a grudge with (someone).
hold a grudge
To stay angry (at someone or something).
bed in
To allow or help to settle in; to make (someone) feel at home.
even the score
To seek or obtain revenge against someone.
settle someone's hash
To physically or verbally subdue someone.
pay off old scores
To settle old grudges by taking revenge.
squash the beef
To resolve a grudge.