The act of sticking the head of a person (usually of diminutive status) in a toilet bowl full of feces and flushing away. The combination of being smothered by nasty toilet water and swirling shit makes the poor shmuck feel even worse about him/herself. (Not to be confused to the actual shocker)
Yo dude! The bowl's overflowing; let's find a poor unsuspecting punk to give the shithead shocker.
I hope I don't see Ralph and Tony today. Last time I saw them, they gave me the shithead shocker.