It's when you start climaxing but stops because you realise its not real cum but just piss
"Oh God here I come"- Matty B
"OH never mind it's a faulty fire alarm"-Miles
When you are about to fingerblast a bitch to investigate the safety of her pussy in preparation for fuckage.
Cole: I had a bad case of faulty fingers when I hooked up with Alexa.
Logan: Let me find out!