Sibsprings 

Collective, gender neutral term for nephews and nieces. Portmanteau of 'siblings offspring'.

I have nine beautiful sibsprings, five nephews and four nieces. So much better when you can hand them back to their parents

Sibsprings by MysteriousStrangerNo.2386 September 28, 2011

SixStringSamurai 

An uber cool guy that plays the guitar and knows the way of the Samurai. Often used in reference to someone doing the impossible.

Dude, that guy just pulled a SixStringSamurai!

SixStringSamurai by HeWhoKnowsAll December 7, 2004