You're a lying sack of shit, and everybody knows it.
5 seconds sound clip from the The Breakfast Club movie soundboard.
You can hear this line at 00:50:50 in the Blu-ray version of the movie.
Quote context
[...]
- That's right. And I'm gonna kick the livin' shit out of you. I'm gonna knock your dick in the dirt.
- What are you going to do about it? You think anybody's gonna believe you?
- You think anybody is gonna take your word over mine?
- I'm a man of respect around here. They love me around here. I'm a swell guy.
- You're a lying sack of shit, and everybody knows it.
- You're a real tough guy. Hey, hey. Come on. Get on your feet, pal! Let's find out how tough you are.
- That's what I thought. You're a gutless turd.
[...]