The absolute worst punishment that a 3yr old can dish out.
Reason:They taste bad and they are ugly so nobody wants them.
A 3yr old will only bestow this reward when they are at their wits end and unable to change their situation with the normal fit pitching, belly aching, moaning, groaning and crying to no avail.
It is also used by adults in a SNAFU situation.
When you won't let the child have their way and they tell you NO NO NO Black Suckers for You!