derpmercial 

A stupid, useless commercial.

Hey man, I saw a derpmercial from the 60s...man it was stupid.

derpmercial by Electroderp July 12, 2018

Dejamercial 

The practice of seeing the same exact TV commercial immediately repeat itself.

Vince the Sham-Wow guy is getting a lot of airtime. His commercial played back-to-back... it's like dejamercial

Dejamercial by kevinjanko October 27, 2009