To begin with, in college there was one guy who hated women in engineering, and he did a speech for a communications class, about how women should stick to being nurses and cheerleaders
When I was starting out in the work force I had to do materials testing. Concrete trucks would come to site and I'd test their concrete and if it wasn't up to spec, they'd have to be sent away, and drivers are NOT happy about that. A lot try to put in extra stuff to clean out their trucks, which throws off their batch. So if I failed their concrete, I got a lot of "STUPID GIRL" and tons of "She doesn't know what the **** she's doing"
Same with testing soil density on construction sites. A few times they called a different company (who only employed males!) to come and test to check my results
I was always right.
I also had many creepy old men call me "baby" instead of my name, which made me feel pretty violated
My male coworkers started to get angry when they'd go out to some of my jobs when I was busy and the guys on site would say things like "You were way hotter the last time you were here"
I mean, it's not like I could help it. I'm a girl, but I wore the same old dirty jeans, t-shirts, vests, and hard hats that all the guys had!
Now that I'm primarily based in the office, I don't deal with it as much except one old engineer who is just finally letting me start working on his projects. Before this, he'd go to every other possible (male) outlet before asking me for help.
I still find it hard to deal with though, I don't have a thick skin, and I don't think I ever will.
I know it's tough, but hopefully when you're done school you will not have to deal with them anymore