Bad babies

I've heard the term "Skeeziks" used by certain older people as a nickname for youngsters. Does anyone know where the term originated, and if it has any meaning?
Is it used in Great Britain?

I've never heard that in the UK.

Nor I. Colloquially over here, we use the ubiquitous "kid", though I've heard the older generation on occasion also use "nipper" or, if the child in question were a truculent and badly-behaved male teen, they might describe him as a "yob".

Years ago I spent two weeks in London and had occasion to stand in line at one of the larger banks. A boy of around 6 or 7 was in line with a woman, presumably his mother, just ahead of me. For some reason, while the woman was not looking and while I was probably lost in thought, the boy hauled off and kicked me in the shin. It hurt, and I was quite surprised, but, being that I was just a visiting American and being unsure whether I had somehow inadvertently given the little fellow some reason to be upset with me, I held my tongue. Mysteriously, a couple of others in one of the adjacent lines saw the incident and appeared to let it go, so I did as well. This boy was too young to be a yob. Does any other word come to mind?

I have a hard time getting mad at misbehaving children. I get mad at their parents. "Yuppie larvae" is a nice derogatory term for children. It has a connotation of being spoiled and ill-mannered. "Crumb crushers," "rug rats," and "yard apes" don't really have a child-friendly ring to them. One of the parenting magazines has a cartoon, "Bad Baby."