I was trying to tell to my fellow drummer friend, that he should play something behind the beat so that we can experiment some particular song. But then I realized that I have no idea how to translate to him. The only thing I could come up with is to say "Just try to play a little later than the beat as if you are playing a flam with metronome".
Do you have any clever ideas to pinpoint the actual swing amount in a sort of quantified fashion? Is it ever possible to translate this feeling to someone else?