Definition
Do not bother with the explanation that you are about to give; be quiet.
Used in a dismissive way of telling someone that they don't want to hear it, or they're not interested in what they have to say.
See Also
How People Actually Use It
Basically a quick way of suddenly interrupting someone and telling them to shut the fuck up--because you don't want to hear whatever it is they are lying about, bragging about, or complaining about. Instantly makes them realize you know they are full of shit and they stop.
"I got this kickass plan and in a week I can make like 150 thou--- --- SAVE IT!"
Source: Urban Dictionary