When a man and woman engage in sexual intercourse by the man strapping himself into a harness (often using the lights as support) and swinging towards the woman.
Joe: Dude, I was doing the Swingboat last nightand then my mum turned the fan on!
When you swing your arm round and round (kind of like Thor with his hammer) and Once reached maximum velocity you insert your fist into someone’s arse or vagina. (Springload, springloaded)
Jeez dude, last night was awesome but fuck you like springloading hard. I think you may have torn somethingdown there. Want to try again tonight?