noun

• (Buddhism) Any other person considered similarly enlightened.
  "At this point, the Amidha Buddha probably has more worshippers than the Buddha himself does."
• (by extension) Any other person considered similarly enlightened.
  "There are some who consider Jesus a buddha, not least because Buddhism had spread to Judaea by the early 1st century."
• (figurative, ironic) Synonym of know-it-all or smartass, a person who imagines themselves smarter or wiser than they are.
  "Sam: Well, our first priority is to make sure the thieves don't strike again. It'll be tricky, 'cause these sorts of gangs rarely have just one target on the go. They've usually researched half a dozen possibilities, waiting for the most opportune circumstances on any of them. Harry Woolf: He knows his onions, this lad, eh? Gene Hunt: Oh, he's a right little smart-arse. So, what do you suggest, Buddha?"

noun

• (US hip-hop slang, uncountable) Marijuana.
  "I know how it feel to wake up fucked up Pockets broke as hell, another rock to sell People look at you like you's the user Sellin' drugs to all the losers, mad buddha abuser"