2) In a high school setting, choir is a sometimes overlooked class or activity. True choir lovers can usually be identified by the way they randomly break out singing anywhere, anytime. There are sometimes even section stereotypes, just as in band: sophranos are ditzy, altos are just jealous of the sophranos, etc. Choirs can often be spotted wearing rather dorky but cool choir robes.
2) I went to choir class and sang my heart out.
Yes, he's the lead in the musical!
WOW... <bows to Bob and kisses his feet.>
1. Acknowledgement with complete agreement. See also "sayin'" or "given."
2. Agreement, but as a response where one is dumbfounded or shocked that another party didn't think there would be agreement.
"So I'm completely jonzin' on this cheeseburger and its fanciness."