ohrwurm 

A song that you can't get out of your head.
lit. German for "earwig"

"Someone just hummed the opening to 'Gilligan's Island' and now I got an an ohrwurm!"

ohrwurm by RPM December 3, 2004

Ohrwurm 

German for "ear worm".

A song that is so catchy that you just cant get it out of your head. Often used in accusatory sentences like "Great job Richard, you gave me an ohrwurm of We Are Number One".

Melanie hummed Megalovania and now I have an ohrwurm.

Ohrwurm by upupuns April 23, 2019