Aussie Slang/ Short for 'Fucking Hectik'
Means - Fucking; awesome, amazing, crazy, best, sickest, unbelievable
Example 1
Bro 1: You get the job?
Bro 2: Yep
Bro 1: That's fectik, congratz!
Example 2
Girl 1: That music event was fectik, you missed out HARD!
Girl 2: dammmn ;(