unfriend

[ uhn-frend ]
/ ʌnˈfrɛnd /

verb (used with object)

to remove (a person) from one's list of friends, or contacts, on a social media website.
Sometimes de·friend [dee-frend] /diˈfrɛnd/,

Origin of unfriend

2005–10; un-2 + friend (in the sense “to add to one's list of contacts”)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for defriend

British Dictionary definitions for defriend

defriend
/ (diːˈfrɛnd) /

verb

(tr) to remove (a person) from the list of one's friends on a social networking website
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012