This is a combination of keys, folowing a VVVVVV pattern, bouncing on the edges of the keyboard letters, that you type when you are so so , I mean like, next level bored.
Wow, this is a sign of severe boredom... you should probably get that checked.
qezctubmo is created by pressing two keys with a gap of one on the top row, then the bottom; then that sequence is repeated leaving a gap between each pressed key until reaching the left boundary of letter keys.