it means terms that are used to insult someone or imply something negative. (god why is this not in here yet?)
some of derogatory terms(words):

asshole(ex.you are a fucking asshole)
cuntface(ex.you are a fucking cuntface you!)
dickbutt(ex.you are a fucking dickbutt you!)
kitkat(ex.you are a fucking kitkat you!)
control panel(ex.you are a fucking control panel)
normalplateletcountによって 2013年11月18日(月)