Slang from the city of Glasgow, Scotland meaning 'ice-
cream cone' but specifically an ice-
cream cone with a wafer triangular base/handle, hence the
hat metaphor.
"Ma, the ice-cream van is outside, d'
ye want anything?"
"Aye, get me and yer Da a pokey
hat and get an oyster for yer wee
sister". ice-cream ice-cream cone confectionary ice-cream van] .