plank

To plank something is to hide it somewhere: "The doughheid planked his winnin lottery ticket somewhere an now he canny find it." Such a hiding-place, or the stuff hidden in it, is called a plank: "Yer Granny's got ginger snaps in a wee plank just for youse."
To plank something down is to set it down heavily: "He planked his big bahookie doon on the settee an said that wis him for the night."

© Michael Munro