What is Bumjob?
1.
to have sexual encounters with a homless person out of pity.
dave: " man i let a homless chick suck me off"
vance : "dude why would you do that?, thats sick."
dave: "dude i felt bad for her so i gave her a bumjob"
See
2.
British slang for analingus. When someone licks or tongues ('eats out') their partner's anus. Other phrases for the same thing include 'rim job' or 'butt job'.
She gave me a blowjob then licked my balls and then she gave me a bumjob.