A derogatory term which was partly originated from the famous video game Left 4 Dead; is used to describe someone or something in a negative and insulting way. Many different meanings can be found in the term "goddamn boomer", it can also personify an object in an abusive manner. It is up to the user how negative the term wishes to be (and what specific meaning it holds).
"Your a goddamn boomer!".
"This club is full of goddamn boomers!".
"What a goddamn boomer!".
"My car keeps being a goddamn boomer, it just wont start!"