Instead of saying, "two fingers" meaning peace, when you leave, you would say "three fingers" to show that you are pissed. It's a more subtle way of saying "fuck you, peace".
Synonyms for three fingers
On this page, you will find 30 slang terms related to three fingers. Some of the top words include: Deucez, 2 fingerpeace, Audi 5000, Dueces, wonderful, and 25 more.