Are you new to the set and want to me taken seriously? Do you want to show up and be treated like you have some knowledge? Then go to this site and learn all the lingo that you could hear on set.
Some of the most used definitions: C-47: clothespin. Stinger: extension cord. Lamp: a general term for lights.
Note: Not a full dictionary of terms. Terms may vary depending on whose set you are on.