Shuffle. To have a wank. Male masturbation.
It is known as having a "5 knuckle shuffle". This is a term widely recognised in London England, as well as most other parts of the country.

Acting obsequious or subservient, in a slave-like manner.

When you have multiple songs stuck in your head that keep changing. Derived from the IPod's Shuffle option.

An incredibly shit style of dancing that makes you look like a complete twat

means sex plainly and simply reffering to the art of taking each others clothes off and penetrating it might not sound the best word but you most often find your big strong grimey men asking you for shuffle and in my eyes call it what you want as long as i get it

to go on a beer or liquor run

To play every song Rhianna ever sang.