Whitney Houston dead at 48 / Bobbi Kristina Brown in a coma at age 21

[Cracker]

What does that mean? Is this US slang that I don't understand.

It means to never leave your unguarded side exposed. If you decide to show your ass, you have to cover it from then on.

Some people store information. Some people let it run through them like a sieve and only save the parts that applied directly to themselves. You never know what kind you are dealing with here. Some of these folks are idiots, some are just fucking around, some are smarter than the average bear.

Don't tell shit you can't defend or don't want to hear about later. First rule of the Internet.