As a HR manager for a new company, I have opportunities to read tons of resumes sent to my inbox. Unlike what I thought, there are still too many applicants, especially student job seekers, highlighting their Multi-Tasking skill in the resumes. I usually deleted those applications immediately.
It’s a deadly mistake to include this skill in your resume. The hype is so dead now.
(A victim of the ADHD syndrome, I many times multi-task as well. However, it is my weakness, not strength.)