Oxbridge slang for someone who is 'superkeen'; that is, keener than keen. Associated with a strong go-getting attitude, but one that is obvious and public, to the point of being awkwardly endearing or backfiring.
Unclear where 'nadster' originates from. Likely related to nads, as in someone who's "got balls", or the Polish 'nad', meaning 'above' - say, 'above keen'.
"Let's try and be first into the club!"
"Nah, nobody's in there. We'll end up floating around like abandoned toilet paper. Don't want to be super-keen nadsters."
"I looked at the slogan I'd painted up on the banner: 'Come on lads, be a nads(ter)!!'. What was I thinking? The pun didn't even make sense. I looked like such a super-keen nadster."
Sloppy Knee is when someone's knee is needlessly violating your personal space. Guys who have this notion that their package is bigger than it is usually have Sloppy Knee. This condition happens when people are just too damn oblivious and/or relaxed. Also see; Sloppy Elbow.
I tried to shift into 5th gear but Uncle Charlie's sloppy knee was draped over the center console.