So... I found irrumatio...
Looking at the posts/wiki it looked like a general tag for non-vaginal(/non-anal?) sex. However looking deeper it seems like it can be defined exclusively as male oral rape possibly with the purpose of degradation. It can also be defined simply as fellatio in combination with thrusting.
It just doesn't seem to fit well with tagging. But I don't know what to do with it: Leave it? Clean out? Disambiguate? Invalidate?
Slightly unrelated rant: To be honest, at first I actually got mad about this, as in it being some kind of "I had sex but I didn't put his pee-pee in my hoo-hoo so I'm still a virgin"-bullshit. Like how some people are still hanging on to the debatable ideas of virginity in that it actually matters in modern society. It's a harmful concept that has never done any good to anyone except the men who insist their women to be "clean from the touches of other men", yet no one cares about how many times the man has wet their wick.
Updated