('chiefly Brit') Her career has been 'on the slide' [='on the decline'] for a couple of years.
You were late this morning. I'll 'let it slide' this time, but don't let it happen again.
His parents are concerned that their son's grades have started to 'slide'. [='worsen']
(..) If something happens to me someday- Hey, Leon, nothing's gonna happen to you. You're indestructible. Bullets slide off you. You play with 'em. Tony, I thought about my money. You remember the girl who came here the other day? Her name is Mathilda. If anything happens to me... (..)1994 Léon: The Professional