What does Alaskan Waterfall mean?

Alaskan Waterfall meaning in Urban Dictionary

when you look at the climactic stages of oral shaft pleasures towards the top of a well padded staircase, the male brings the shaft away from said face opening and profits to swiftly jump kick partner down the staircase while ejaculating in mid-air. This action should gain enough force to hit your lover while they fall hence finishing the act.