The feeling of excitement when exacting petty revenge, or simply witnessing someone get what they deserve.
1:
- "Hey, did you hear about the Westboro Baptist Church picketing a soldier's funeral this weekend?"
- "No, what happened?"
- "The police formed a barrier around the cemetery and arrested the ones that tried to get in. Gave me a raging justice boner."

2:

- "Remember how Jeff has been stealing my lemonade on his lunch break?"
- "Yeah, why?
- "Well, today I filled the bottle with my own urine instead, and I saw him try to drink it, then run into the bathroom and puke. HUGE justice boner."
by jet_tripleseven June 3, 2013
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The penis becoming extremely hard at the sight of justice being dealt. While defendants found guilty result in a semi justice boner, life-sentences can increase the vitality and strength of the boner.
Judge: The defendant has been found guilty, and is sentenced to life in prison.
Random person: "YESSSS"
Random person 2: Why do you have a stick poking out of your pants?
Random person: That's my justice boner.
by limlams745 February 1, 2019
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1. The hard-on a man conjures in order to rape the man who raped his son.

2. Term of endearment for a penis named 'Law' when it achieves erection for vigilante use.
plinky4: I'd like to believe that I could keep a furious justice boner going for at least an hour.
by ehdawg December 2, 2009
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The feeling you get when justice is finally performed on someone has been dersiving of it for some time. This is generally heightened wit the demise of corrupt officials.
"Finally Trump is being charged for incitement of the January 6th insurrection. I have such a justice boner right now."
by Zombieslayer69 September 24, 2023
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