Lancashire (where we talk proper): Baby's head. Noun, Steak (and sometimes kidney) pudding, especially when ordering from a chippy, and so called because of it's close resemblance to a baby's head. Most commonly ordered with Peas and gravy.
Correct pronunciation: "Babbiz yed"
Ey up lass I'll have Babbiz Yed (baby's head), peas & gravy twice, please.
The process of celebrating the birth of a baby. Traditionally taking its name from the Christian baptismal rite, during which the head of a baby would be wet with blesed water, the phrase now commonly relates to the consumption of large amounts of alcohol as a celebration of the new arrival.
The actual process of wetting the baby's head is far more fun before the baby is born.
Bloke 1: check out the cans on that barmaid.
Bloke 2: Dude, you're married.
Bloke 1: Yeah, but...
Bloke 2: You're wife just had a kid.
Bloke 1: Yeah, well..
Bloke 2: We're here celebrating, to wet the baby's head.
Bloke 1: True. But she has got really nice cans.