Nearly as erotic as it sounds. A blob job is an instance when someone screws up in a sexual act.
OH NO I JUST DID A BLOB JOB! i'll go get a towel.
a blob job is where an over wait person preforms a sexual act such as a blow job, by using his fat folds to comfort the males balls. the over wait male/female will proceed to give a blow job while being naked. as the male ejaculates into the over wait male/females mouth.
hey man i got a blob job last nite!
really? whats it like?
it feels good i totally came into that fat hookers mouth last nite!