It’s not slang, it’s slaeng

I have an old IBM laptop in the apartment. When Jojo came here for a vacation, he used the said laptop. Because it was old, it wouldn’t function very well. He told me to borrow the Windows installer so he can reformat the computer. When I arrived at the office, I immediately went to our IT personnel and asked her if I can borrow the installer. When she asked why, I told her that my computer hangs. She said "Hangs?” so, I explained. I told her that whenever I opened an application, the computer stopped responding. Then she said, "Oh, it haengs!".