Mostly it's just in the form of a vast majority of male co-workers I've had being misogynistic and homophobic. Ridiculing other men for showing any emotion other than anger. Pushing people to do things they know the other isn't comfortable with doing, by calling them gay (in less pleasant words) or a pussy. Telling racist jokes and/or using slurs. Believing physical strength is the best and only measure of masculinity. That kind of bullshit.