The act of giving or receiving a blumpkin while on the street. Subject A proceeds to defecate in a street, sidewalk, or alleyway. Subject B performs fellatio on Subject A during the defecation process.
The homeless guy was already taking a dump in the alley; I thought I would be charitable and give him a Street Blumpkin.
Similar to a Dutch Rudder, but performed with ones mouth as opposed to a hand. An Oral Dutch Rudder is achieved with the help of a friend. As you try to perform autofellatio, the friend will assist by pushing your head down into your crotch. Often, the Oral Dutch Rudder is the only way most men can achieve autofellatio. One must exercise caution, as an overzealous friend can easily lead to back problems, and in extreme cases, a broken neck.
Zack helped me with an Oral Dutch Rudder last night. I wouldn't have been able to reach without him.