Why are some U.K. citizens sometimes referred to as "bobaks"?

No idea, never heard the word Bobak before. Presumably it's some kind of insult?

1. A disgusting mateless anal creature closely resembling a sheep. The Bobak can often be found sucking at the end of peoples members.

2. To penetrate in an uncomfortable position. (I was never regular, but after getting bobaked in prison I am doing fine.)

3. To fail despite high expectations, to backfire miserably due to the overt use of vulgarity. (Despite heavy studying and prior strong results, Greg was completely bobaked on the anatomy exam)

Not sure which actually applies to UK citizens?? Not my definitions either!! I found this term 100x times over when I actually searched for the term using a search engine. Then I signed up for Yahoo so people who don't use search engines can know the answer!

Where?

If the term exists at all, it's presumably some regional expression unknown in the UK.

PS John: I saw the Urban Dictionary entry and ignored it because, the UD being user-submitted, half of it is idiolect/trolling. In this case, I suspect someone's trying to get at someone whose surname is Bobak. It doesn't mean the word is used in the real world in the way the asker said.

I am from the UK and I have NEVER heard that before. We have many nicknames, but that is not one of them.

I didn't know they were, never heard of it !

racism