The Act of after receiving head with a Condom on and then taking said Condom and hitting Someone with it.
Could be the person who gave head or a random bystander, Watch your head.
"I ended up SlingingGo-gurt at her and then leaving"
"I know someone around here Slings Go-Gurt so be careful"
A euphemism used as a reason for violently and abruptly taking a device (or unplugging it, etc) from someone who has inadvertently stumbled upon your vast, digital library of self-abuse.
You don't want to watch that mom....they end up strangling the kangaroo