Not totally positive, but im pretty sure it means having a useful thing but you've given it to someone else, but now you need it yourself and don't have it anymore.
reegheh
oar
it's pronounced "park" as in a nature park then "oar" as in a boat's oar.
an oar or paddle
oar
An Oar
oar
A scull boat; one oar to the stern.
A thole is a hole for the pin of an oar in a row boat, so a thole filler is an oar.
A rowlock or oarlock (US) is a brace that attaches an oar to a boat. When a boat is rowed, the rowlock acts as a fulcrum, and, in doing so, the propulsive force that the rower exerts on the water with the oar is transferred to the boat by the thrust force exerted on the rowlock.
Thole pins are the names for the two pins set in the gunwales of a boat to hold an oar in place.
You not only use the oars to move forward, but you can use an oar to steer or turn the boat.