Unfussier describes a person who is easy-going, relaxed, and doesn't make a big deal out of small things. However, there are antonyms for this word that describe people who are quite the opposite. One antonym for unfussier is fussy, which means a person who is overly particular about details and gets upset over small things. Another antonym for unfussier is finicky, which means a person who is very picky and fussy about their choices. Choosy and demanding are also antonyms for unfussier, as they describe people who have high standards and are not easily satisfied. These antonyms show that unfussier people's personalities are the opposite of those who are picky, demanding, and fussy.