Speaking as one who has been referred to variously as "Greasemonkey" "Greaser" and "Grimey" TO MY FACE by aircrew I'm not too worried about us calling crew by rude names but please, let's be gentlemanly and use no names that cast doubt on ladies' morals.
The very worst case I came across was a Captain who didn't call me anything. He refused to speak to me at all. Insisted on speaking through the Flight Engineer and even though I replied directly to him continued to address me indirectly through his Flight Engineer. Both the F/E and the F/O were mightily embarrassed. I just pretended not to notice, after all, I'm an engineer so I'm used to being invisible
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Through difficulties to the cinema