Slacker Apocalypse by Peter Naughton and Jonathan Ratner.
Before the cataclysm hit, Phil and Milo were drifting through life without much purpose, direction or many persuasive reasons to leave their couch. Now the world they knew has vanished, replaced by a nuclear nightmare that has them fighting for their survival, their sanity and a replacement sofa. Join them as they wander the wastes in search of someplace new to call home and try to do their part to help rebuild society while resisting the urge to kill each other along the way.
This comic is rated PG-13 and contains profanity and an instance of male cartoon butt.