Fame-by-association conversationalist

• "So Matthew McConaughey says to me ..." sayer, e.g
• Supercilious sort ... or the title for this puzzle
• Egotistical conversationalist, like Cher?
• Seeker of admiration in conversation via associations
• Status-seeking sort ... or a solver of this puzzle, initially?
• Someone who pretends that famous people are his/her friends
• One with dubious connections

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