"Doesn't do it for me"

• "It's not great, but not terrible either"
• Word said with a shrug
• "I can't get excited about it"
• "I've seen better..."
• Interjection of disinterest
• Attention-seeker's turned up - am I bovvered?
• "So-so"
• [Yawn]
• "Whatever ..." (for the record, this isn't a "Simpsons" neologism, despite what the Internet tells you)

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
expression of apathy or indifference, by 2003 (perhaps from 1992).