He's a fucking rat, that's what he is.
4 seconds sound clip from the Platoon movie soundboard.
You can hear this line at 01:01:31 in the Blu-ray version of the movie.
Quote context
[...]
- He's a fucking rat, that's what he is.
- He's gonna get everybody in this platoon in deep shit.
- Somebody ought to frag his ass.
- So, what do you think there, Bob? Gonna be an investigation or what? Bob?
- O'Neill, man, you worry too much.
[...]