Sir Pumpernickel is a pretentious guy that makes a failed attempt at trying to appear "cool" to others. More commonly known as a "show off".
*Donny, a guy that loves beating women, sells some pink shirts for breast cancer awareness day*
Lizzy Jean: Oh look at Sir Pumpernickel over there. I'll bet he thinks he is important.
When your poop is really long and you shape it into a neat pretzel
“Damn homie I even gave her my pumpernickel pretzel and she STILL cheated on me”
The father of the great gibby pumpernickel
Thaddeus von pumpernickel III really on that BULL this time
cutting off all of one's hair and subsequently putting said hair into a bowl (or a similar receptacle)
The barber gave Thomas a pumpernickel tickle last week.
code for "lesbian intercourse"
(can also reference prostitution)
The act of putting a loaf of bread called "Pumpernickel" into ones ass ;using it as a homemade dildo excitedly.
I got horny and head nothing but a piece of bread so I rambunctious pumpernickel that bitch.