Throwaway comment on the internet, usually on sensitive topics that the poster has not invested the necessary time, resources, or even just consideration in actually understanding.
Combines Trump, Post, and Compost.
"Why did he post that on Twitter? It's offensive to Mexicans and it makes him look like an idiot."
"Did you read it?"
"Yeah, I read it."
"Then the Trumpost did it's job. "
when you find out your parents / family voted for Donald Trump and you start to reflect on your past life decisions like when you were 8 and you contemplated leaving your house because your mum took your DSI. And you realise, you really should've left so you would go on a trumpus (leave forever) and you wouldn't have to feel disgusted when looking at your family coz they ruined the whole of america. :))
Me: omg Donal Trump has won
Mum: thats great, my vote counted
Me: Bye mum i'm going on a trumpus *leaves house for 4 years until another president is elected*