I have a junior friend living in same building where I used to live. I used to help him in small doubts related to college and in some random stuff.

I once typed an application in a language which does not have its fonts in ms word by default. I used Google typing tools and Google docs to type and format it. I even taught him the process which is easy to understand.

Out of blue, after few years, this SOB pings me today and asks same thing to do again since it's urgent. I told him that I am middle of something and told him to use same tools as I used and give it a try. This fucker says he forgot how to do it. Well no problems, I told him how to do it and I will not be able to do it for him right now.
He said then try doing it after coming back to home.

Mind you that he is an engineering student.
You asshole, if it is so much urgent then use your brain and figure out this small thing yourself. If you can wait till I come back home then in which fucking way it's urgent? Go fuck yourself. I am done with your shitty attitude and on next offense you are going on my block list.