"I didn't say the N-word! I said it with a zed!" -FraserGold in my teeth (Also: Gold in mah teeth) is a meme beginning in the Frasia build, where Fraser talks about how gold is almost entirely useless, except in technology and by "hip hop" dentists, prompting Fraser to rap:
"Gold in my teeth, I got gold in my teeth. What up, niggaz?"
This rap has been referenced by various participants in later build challenges, and is also a well loved phrase of the Chatroom and the show's YouTube audience. Though some were initially shocked by the use of the word "niggaz" in the song, it was eventually taken in stride. Nothing is sacred on the show, anyway.