What is this? I just read it in a review.

I'd suggest PMing the reviewer and asking.

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If I put on my creative-thinking cap and try to both reason and  sound it out...

 
Slurp n Gulp?

Sit  n Grip?!

Stroke n Grope???  

Stroke n Gulp?!?!   (now I have that song Strokin' in my head lol)

Slow n Go??

 

I'm sure others can think up better and perhaps more appropriate ones  but that's all I've got for now.  :-

I'm thinking Stow n' Go, like in someone's minivans (Chrysler, I think?) Which is itself disturbing...

Seriously, that has to be it.  Total "duh" moment for me that I didn't immediately think of it lol  

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The reviewer confirms that this is an acronym for "slide and glide."  Same as "stripper slide."
Mrfisher, the UD has a listing for "slide and glide," but not for "S'nG."  UD also says it's the same as "camel slide."
It's always a great day when you can learn something new.