The Simpsons wiki claims that this guy is Mervin Monroe, brother of Dr Marvin Monroe, but I am not sure what the source is on this - I'm guessing a comic book, but I'm erring on the side of caution and not committing to this here. It also claims his beard is a tattoo, which, if true, rules.
This guy will occasionally show up in the background - very rarely - but obviously not a classic character. So instead let's use this opportunity to look at this amazing Abe Simpson tattoo that surfaced recently.
This post is part of my "Every Simpsons Character Ever" series. For a list of my rules in this project, click here.