bezzie
adjective
[ ˈbɛzi ]
• denoting a person's best or closest friend.
• "we're practically bezzie mates"
bezzie
noun
• a person's best or closest friend.
• "she and Nadine used to be bezzies and even shared a flat"
Origin:
mid 19th century (isolated US use, apparently in representation of vernacular speech): colloquial alteration of best.