An erect penis.
Useless or cumbrous material.
A baseball bat.
Wood sawn into planks or otherwise prepared for sale or use, especially as a building material.
To fill or encumber with lumber.
To move clumsily and heavily; to move slowly.
To heap together in disorder.
To load down with things, to fill, to encumber, to impose an unwanted burden on.
One leg of a pair of pants, a trouser leg (UK English).