Short for "budge," which is short for "budget." Usually used to refer to something as being less than acceptable in a major way, or of low quality. To say "That's buj" is equivalent to "That sucks."
That waiter is so buj, he forgot to bring me my wine!
To eat a lot of food. Based on "truffle pig," which is an animal used to seek out truffle mushrooms. If you eat a lot, you are a truffle pig. Can also be used in verb form with the word pig included, and can be shortened to just "tp."
I just truffled that pizza.
I'm going to go out and truffle pig at the restaurant tonight.