This is primarily used by young African-Americans, however it is used by all American youths. To "be trippin'" (the "g" in the suffix "-ing" is usually not pronounced) can mean either that 1) someone is out of control; or that 2) they have a misconception. Ex for use 1) "Calm down. Stop trippin' about how they got your order wrong at McDonald's." Ex for use 2) "You're wrong about how I make poor grades in school. I make good grades in school; don't be trippin'." There need not be an "-ing" suffix either, so that the term can be used in this way as well: "Don't trip." It is never said that someone "tripped"; only that someone was "trippin'."

"Ass" is inserted to add emphasis to the subject. For example, if you saw a large house, you might say it was a "Big house." However, if you wanted to emphasize the size, you could say it was a "Big ass house." This is considered vulgar, of course.

To "punk" someone means to pull a prank on someone. To "get punked" means you were the victim of a prank. This term was probably popularized (or invented?) by Ashton Kutcher's show called "Punked".

It means no matter how hard one tries. Ex: If you wanted to say that no matter how hard you tried you could not stay awake in class, you would say, "With the best will in the world, I could not stay awake during class."

Because "hambre" does not mean hungry and "sed" does not mean thirsty. (They actually mean "hunger" and "thirst", respectively.) They are nouns, not adjectives. Therefore, when you say, "Tengo hambre," you are literally saying, "I have hunger." "Soy hambre" is like saying "I am hunger" as if that is your essence. "Estoy hambre" is like saying "I am hunger" as if hunger is an adjective, which it isn't. It is as weird as saying, "I am computer." Computer is a noun, and so is hunger. In Spanish, "sed" and "hambre" are nouns.

Vuelvo en seguida. The other ones are too literal and incorrect.