"Peacenik" means anti-war pacifist. It was an insult used by old folks to disparage Vietnam War protestors, implying they were filthy communists for protesting the war. Protestors and anti war activists "owned" the word, and it entered the '60's & '70's popular vernacular, along with "hippie". So, yeah, I don't think Ironchew should feel insulted by being called one. You might as well call him a goll darned whipper-snapper and tell him to get offa your lawn.