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1.
Stands for Period-Doodie Stank. A combination of the odors emitted when a female has her period and is defecating.
"Daaaamn!!! She left da baffroom PD stankie!!"
by Las Aquafinas April 19, 2003
 
2.
The vile and overpowering stench that emanates from a female's mentrual doodie.
"Wow, now that's PD stank, courtesy flush please!"
by pee - dee Sshtank April 26, 2003