I don't usually offended really easy, or more or less I don't take it to heart much. However the few things that really do push me are often things said to me by snotty extended family.
The biggest one personally are their comments usually on my appearance and how I choose to act. They always tell me, "Why are you wearing that?", "You don't look good with what you're wearing?" and the big one being "You should be dressing more like a girl" "...especially at your age" "stop trying to dress up as a boy it's disgraceful".
Who are you to define what being a girl ia? They have never told me to act more feminine, but to be more like a girl because to them I'm obviously not dressing up like a girl like I HAVE to.
Just because I prefer to wear hoodies, t-shirts, jeans and sneakers than to wear dresses, skirts and heels or whatever their definition of a girl is doesn't mean I'm TRYING to dress up like a guy - most of the clothes I get are even in the girls section. They don't understand even after how many times I tell them that their idea of the "right type of clothes" I generally feel uncomfortable wearing and yet it is expected that I'm suppose to wear it every day wear them every day like a "proper young lady" and to throw my "rags" away in the trash where they belong. Sure for events like certain party events or work interviews I will wear something proper to fit the occasion, but that's not good enough for them since they want to change my everyday wear as well.
My hair also doesn't help because it's usually kept short for health reasons. Sometimes it's boy-short so I'm quite used to getting confused as a boy often (I'm not offended by that) and other times it's noticeably girlish above the shoulders type but they keep reminding me how I should grow my hair longer because I'll look much better "anyway" - more or less to fit their image of what a girl should be.
Apart from that, because of how I'm dressed they think I'm gay despite being straight because "that what all lesbians do and dress" apparently and I have no chance at getting a boyfriend if I am actually straight...
tl;dr My extended family are extremely stuck up and according to them I'm not a "real" girl.
so much inner rage...
Apart from that, people who speak badly about people close to me I will come to their house and slaughter them because I don't take that kindly.