I do it all the time, I get odd looks and deep inside my inner nerd is laughing its head off. That's right, you know you have done it too, Shouting "Waaaggghhhh" when in the queue at the supermarket or saying its "For the Greater Good" when justifying another round of beers in the pub.
I have a close mate who had a tumour removed from his tonsils yesterday. We were having a laugh about it a few days previous and I dared him to say "Blood for the Blood God" instead of counting to 10 when he was anesthetised. Like a true chaos player he followed though with the dare and I have just pre-ordered him the codex as his reward.
Anyway what well known 40k phrases do you guys use in everyday life, much to the annoyance of others
My kids love being referred to as "the snotlings" at parents evenings, the teachers however seem to be devoid of humour.