Thanks you all, it really helped. No he is not friend like that, only a work friend.
I nerver knew that people write qk instead of "kuk" in Sweden so it was quite a shock to me.
But you guys are all right, it means something to me and the majority won't read it as a word and I have to stop thinking about what he said.
The thing was that my mom and dad have not seen the tattoo so I was worried that they may missread it too.
Whomever said that to you was a jerk. First, the tattoo was for your mom and dad - it's yours and you got it for all the right reasons. Second, I don't know if it was a "friend" that said this to you. Regardless, the comment was inappropriate. If you have a chance, you should tell them how much the comment upset you.
THEN, get on with enjoying your new tattoo.