A meme very similar to cum jar but instead of a jar the container is a barrel.
This Phrase could be used as a war cry or an insult
war cry- Andres: CUMMMM BARRELLL!!!! (proceeds to die)
Insult- Bitch on the street: ugh look at this asshole he's such a cum barrel
Me a few weeks ago: wtf? did someone just call me a cum barrel