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1.
1. Utter nonsense.
2. Bull-shit

When someone is saying a whole lot of nothing. In other words, when someone is talking a whole lot of shit!
1. Quit that yanging man!
2. You talkin' a whole lotta yang! (shit)
by IJ March 31, 2006
 
2.
Described as the feeling you have the morning/afternoon after taking amphetamine, or hallucinogen-based narcotics. What goes up must come down. Ying and Yang etc. etc.
Tom will mercilessly slaughter you in Wii Sports because he's yanging from a big one last night.
by xorn69 June 14, 2007