Blow-worthy
When a guy does a favor for a girl that's so helpful, so amazing, only a blowjob is suitable repayment.
"Wow, Sarah. Last night my car broke down at 3 am. And the only person who was still up was James. He drove all the way across the city and helped me get it started. Then he escorted me home to make sure it didn't die again."
"That's definitely blow-worthy. Did you blow him?"
"That's definitely blow-worthy. Did you blow him?"