1. In investigation, when police interrogate neighbors.
2. Slang for casual sex.
No, I didnât sleep with your boyfriend, I just stopped by for a âknock nâ talkâ.
âWhat are you doing tonight?â âOh, I thought Iâd do some âknock nâ talksââ
Heâs not my boyfriend. That was just a âknock nâ talkâ.