Someone who pretends that famous people are his/her friends

• Fame-by-association conversationalist
• Status-seeking sort ... or a solver of this puzzle, initially?
• Egotistical conversationalist, like Cher?
• One with dubious connections
• "So Matthew McConaughey says to me ..." sayer, e.g
• Seeker of admiration in conversation via associations
• Supercilious sort ... or the title for this puzzle

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
namedropper \namedropper\ n. Someone who pretends that famous people are his/her friends. Someone who namedrops.

Wiktionary Word definitions in Wiktionary
n. a person who name-drops