Updated: DECEMBER 21, 2016
Pecker is a slang term used to refer to the penis. It likens the male organ to a bird's beak, pecking at every speck of sustenance they can find. The term is still considered vulgar. It should be used discretely. The medical term 'penis' is still the best way to refer to a man's sexual organ.
More About Pecker
A pecker has many personalities. It can be polite and considerate. These peckers go in only when invited. They never impose themselves on others. Other peckers, however, can be downright rude. These peckers feel like the world, especially its women, owes them attention and sex. If one has a pecker, it is ideal to “train” it to behave and treat others right.