Meryn Stol added this answer. Meryn Stol Some other common ones: 1. "Idioot". Idiot. This one is simple. (note, "idioot" is also an adjective, meaning "idiotic") 2. Mongool. A somewhat vulgar way of saying "idioot". Literally, "een Mongool" is a kind of inconsiderate way of describing a person with Down Syndrome. The reason: People who have Down Syndrome may have Mongoloid facial features. 3. Homo. "Een homo" is a homosexual man. Typically this is used as an insult used by guys aimed toward guys that deviate from some norm of masculinity. Effeminate in some way, not tough enough, maybe bad at sports. "Homo" is also used more playful to call out any stupidity or clumsiness. Your friend just dropped something: "Homo!". Despite being meant innocent, it does reinforce the notion that being "een homo" is simply something bad. I found a master thesis about Dutch swearing behavior, including how swear-words are used as insults. It says this: Tevens heeft Van Sterkenburg (2008) de meest... - Meryn Stol