totalan

1. colloq. (as an intensifier) total; complete; utter
   Na putu je bio totalni haos. — There was total chaos on the road.
   Taj film je totalna katastrofa. — That film is a complete disaster.
2. total
   Sutra će biti totalno pomračenje Meseca. — There will be a total lunar eclipse tomorrow.

The adverb totalno is very common in speech: "totalno sam umoran" (I'm totally tired).