This refers to when you get so drunk that you are willing to finger a girl in a bar. It usually refers to fratstars, but anyone can perform a shanjob
He was so hammered that he gave that chick a shanjob!
by gdiofkys November 15, 2011
When Shannon pokes her finger into Ryan's butt-crack while hugging him, sliding her finger in and out vigorously
"shannon, did you just give him a shan-job???"
by ShamrockShaker69 June 17, 2013