Snakerider
When one person put their thumb up their asshole while masterbating and another guy sucks on his cock.
Brian says to Ken "Hey Ken come over here I'm about to go snakeriding and I need your help. I will be the Snakerider this time".
Alabama Snakerider
When the girl sits on your dick longways like one would if they’re riding large snake. This may be accompanied by a “Yeehaw”.
She was an alabama snakerider and broke my pelvic bone.