Flejia can mean anything. It is a word used in place of other words. It can be used as a noun, verb, adjective, adverb, proper noun, exclamation, you get the idea.
You: "Hey man, can I get a side of Flejia with my crunch wrap supreme?"
Taco Hell guy: "Hellz yea mane, we wont even charge you because we don't give a Flejia!"
When talking with your mother...
Mom: "You better clean your room!"
You: "Shut the Flejia up mom, and make me a sandwich and some waffle fries!"
When talking with your friends...
Friend: "Check that fine girl out."
You: "I would love to flejia that!"