Ahh jealously - I've encountered this so much. I've had comments such as ' I could have done a PhD if I had wanted to' (but you didn't.. so how can you assume that?) to men (not many women in IT) getting really agressive, asking me a computer science question to which I am honest and say ' I have no idea' and they'll reply ' Ha! so I know more than you even though you have a PhD... not so mart really, are you?'
Ahh yes, and the ones who deliberately trivialise it.. 'some course', 'you haven't finished yet? too much drinking?' .. I would just do the same to them ' so you have a kid? er great.. all you need to do is lie back, get pregnant and pop it out' .. ' new job? all you had to do was sleep with the boss'...