not bad, better than average

Doing 60 sit ups and 40 push ups. A punishment used in sports, especially soccer.

When some one sells you “coke “ but is really 60% meth 40% coke to get you addicted and sell you more

A type of bar when 60 year old men hit on or ask out 40 year old single women.

A 40/60 situation is a situation like a 50/50, in which there is an ALMOST equal chance of one thing or the other happening, but the chances are leaning more toward the slightly-more-likely "60" possibility.

Rule that states that a gay male at 18 starts worrying what people think about him, at 40 stops worrying what people think about him, and at 60 realizes no one was thinking about him the whole time.