the process of having one's digital data (e.g. contacts, images, music files) suddenly and irreversibly deleted from a local or remote ("cloud") storage device (e.g. mobile phone, computer, server) without having caused, or contributed to, such action
Girl, I would've called you back last week but I got sidekicked and lost your digits
When two tight friends (sidekicks) drift apart because one of the pair gets in a serious relationship with a member of the opposite sex. The abandoned friend will always harbor some degree of resentment towards the interloper for ruining the friendship.
As soon as my buddy of 15 years got a girlfriend,I was sidekicked to the curb.