The small adapter (cord) that connects your headphones to your iPhone on an iPhone 7 or above. One end of the dongle is plugged into your phone and the other end to your headphones. The dongle is needed because in the iPhone 7 and above there is no headphone jack for some reason. It is small and easy to lose, and sounds like a word for penis.
"Hey man, do you have a dongle? I want to listen to music but I lost my dongle."
"Sorry, I have an iPhone 6. I don't want a phone without a headphone jack!"
(Psych): what Shawn Spencer thinks is slang for "penis"
Chief Vick: All we have is that the perpetrators took was Inspector Sloane's dongle.
Shawn: Oh my god!
Gus: It is not what you think.
A person who leaches off people for certain things such as money or a place to stay.
Dave - "Can i borrow some cash for food"
Steve - "Dave ur such a f*cking dongle"
It's a short way to say "I've nothing to say"
"That movie is so boring, what you think about it?"
"dongle"
"ok"