やがる　= indicates disdain for one's actions In this case, someone stuffed a fish up his nose, and he thought it was disgusting.

If it's "Iyagaru", then the first answer is correct. But if it's "yagaru" that something you add to the end of the sentence, as in "Fuzakeyagaru", the yagaru is a slung which is bad language ^^! but you can use it as a very good,ironical joke as well. "Yagaru" is something was done should have not, or the way you didn't like it. I say: 妹はわたしのいちごを食べやがった。 Imouto ha Watashi no Ichigo wo tabeyagatta. which means; My sister ate my strawberries,. you can put some cuss word to fit in this sentence, then that would be "yagaru". I hope you won't have any chance to get fish in your nose bc It seems practically impossible and if you had it should be very unlucky! haha.

wow.. I answered to a comment window ><" I'm going to copy n paste to "Answers".

Is it something you add to the end of the sentence? as in "Fuzakeyagaru". If it's so the yagaru is a slung which is bad language ^^! but you can use it as a very good,ironical joke as well. yagaru is something was done it should not be or the way you didn't want to. I say: 妹はわたしのいちごを食べやがった。 Imouto ha Watashi no Ichigo wo tabeyagatta. which means; My sister ate my strawberries,. you can put some cuss word to fit in this sentence, then that would be "yagaru".

to hate to dislike