Definition of poke at:
stitched to an item of clothing, used for carrying small items; a net or similar struture at each corner, and halfway along the edge, of a billiard table
into which balls are to be struck
"the drilling expedition discovered a pocket of natural gas."
to put (something) into a pocket; to cause a ball to go into one of the pockets of the table
of a size suitable for putting into a pocket