When you put your dick in the exhaust pipe of a buss, then fuck it hard until the buss breaks down into small pieces. Then you blend the small pieces in a mixer and shove it up your ass.
"Where the hell did Jacob go?"
"I heard he went for a dirty Sigge"
A "Dirty Alexander" is when your girl or guy is choking on your cock, And you pull out and you twist his/her nipple till he/she screams and drop a load at the same time on either eye giving him/her different colored eyes like Alexander the Great.
He is going to the eye doctor because he said the Dirty Alexander gave him pink eye.