add some words, also match fuuuuuck and shiiiiit (for example)

All words added pulled directly from git repos I maintain. The only borderline word - 'kill' - was used solely in the context of "kill me"  or "you're killing me" or "I want to kill <someone>" - never in the sense of "Man, I'm really killing it today. Look at me!" That may be a reflection on me as a sysadmin.