“Who cares”

• "I could take it or leave it," slangily
• "___ Lady," T. N. Page short story
• "I'm not that excited about it" grunt
• "Not so great"
• Unimpressed reaction
• "I'm not really excited"
• Underwhelmed grunt
• "Color me unimpressed"
• "Doesn't excite me"

Wiktionary Word definitions in Wiktionary
a. 1 mediocre; lackluster; unexceptional; uninspiring. 2 apathetic; unenthusiastic. interj. (context slang English) (non-gloss definition: Expressing indifference or lack of enthusiasm.)