posset

A beverage composed of hot milk curdled by some strong infusion, such as wine.

I have drugged their possets.

A baby's vomit, comprising curdled milk.

Some people will tell you that this position may allow inhalation of posset, but there is no evidence to support this.

Derek saw that a smear of posset had appeared on the left shoulder of his jacket [...] He smiled softly at Charlotte and said softly, 'I've been puked on.'

A pudding-like food composed of cream, sugar, and other flavoring, such as lemon.

LEMON POSSET / WHY THIS RECIPE WORKS : The classic English dessert lemon posset transforms cream, sugar, and lemon into a lush pudding with clean citrus flavor. It is the easiest dessert you've never made.[…]

To curdle; to turn, as milk; to coagulate.

to posset the blood

[…] And with a ſodaine vigour it [Hebenon, a poison] doth poſſet / And curd, like Aygre [vinegar] droppings into Milke, / The thin and wholſome blood: […]

To treat with possets; to pamper.

Nevertheless, as she laid him in bed and posseted him, how frail and fragile he looked!

To vomit up curdled milk.

Some babies never posset at all. Others do so with surprising ease, and this can be quite a cause of concern to parents.

All babies posset.