Making an educated guess.
Extrapolating from previous experience and personal knowledge either to predict future events or explain events about which you have no direct knowledge.
"Why did she ignore me just now?"
"I'm just fishing off the bridge here, but I think it's because you didn't call her last time."
Man: Sometimes it's hard to resist the urge to drive right off a fucking bridge HHHhahaha ohlook there's one
HUUUUhddJSUGYDSDKUHDHGUDBUJWYDYJLAKSJLKDLJSHIDHKNEKBDIFHLSNDBKS