I need help thinking of a couple similes for bullies! please help

http://www.google.com/search?hl=en&biw=1366&bih=643&q=simile+bully&oq=simile+bully&aq=f&aqi=&aql=1&gs_sm=e&gs_upl=7154l9556l0l9926l12l12l0l1l1l0l287l2211l0.2.8l10l0

Go through many of these until you find what you need.