Keen As Cheese And Mustard Edit Meaning

1.

To be excited and/or show agreement towards participation in an upcoming event

All over gang member 1: "Halo?"

All over gang members 2+3: "Halo!"

All over gang member 4: "I'm as keen as cheese and mustard to play Halo"

All over gang member 1: "Then let's play"

See halo, keen, cheese, mustard, all, over, gang