The word "Fetch" was used often in Lindsay Lohan's movie Mean Girls. What was the meaning?

The word "Fetch" was used often in Lindsay Lohan's movie Mean Girls. What was the meaning? 

Lacey Chabert, who acted as Gretchen Wieners, use the word "Fetch" quite often in this movie Mean Girls. The meaning of the word is cool or awesome or nice and it became iconic.