"jobbin'" is the act of giving a
rim job. It can also be used when referring to someone who is being a tool or
sucking at life. Proper usage is similar to that of
the term "chillin".
"Maya was really jobbin' when she was
on the floor with her pants down and her head in the toilet on new year's."
"Did you see Nick throw up on that girl's couch, then on her
sliding door and then on her kitchen floor? I can't believe we left him
passed out in the snow in her backyard, he was alone just jobbin' with puke all over him."