Originally inspired by the 80's rapper Doug E Fresh. He did a motion where he rubbed his head with his hand from the front to the back.
Later, rapper Cam'ron coined the phrase in a movie. He was sexin a girl doogystyle and did the same motion as Doug E Fresh. "I hit her with tha dougie" This can be used when talking about havin sex with a female
Now, there is a dance called the Dallas boogie that later turned into the dougie because the Doug E Fresh motion was added to the dance
"Man, I hit that hoe with tha dougie! Had her screamin my name and shit!"
"They need to play Lil Wil so I can do my dougie!"