Kind of a southern term I guess. You might know it as 'fatwood' or 'fat lighter'.

When pine trees are cut or fall naturally there is often a stump left in the earth. Connected to this stump are roots filled with sap. If conditions are right this sap flows from the roots into the stump even as the stump is rotting. The wood, the lower part of the stump and often a few of the larger roots become saturated with this sap and will not rot. Even after many decades.

If your careful and observant you can sometimes find one of these stumps. Looks like what it is, a rotted pine stump. But if you cut into it you can smell turpentine and see that a good chunk of wood has not rotted because the heartwood is soaked in turpentine. Even soaking wet this stuff catches fire easily and burns fiercely. A stick the size of you little finger will get even wet wood burning. It is a traditional material for lighting a fire and the term used for it is 'lightered' pine.

There was an entire industry made around the turpentine industry. Originally they would harvest sap not too much different than they do with maples. Slicing the bark, hanging a trough and collecting it. The sap collected was cooked to extract the turpentine, pine oil, and rosin. All valuable commodities. Goes way back.

But in time between the trees cut for wood and killed in collecting sap most of the big long leaf pines in Florida disappeared by the late twenties. But lightered stumps, most often from trees cut for lumber in marshy ground, don't rot and remained because they were considered too difficult to pull out.

Later, when times got tough and jobs were hard to find men would walk the woods, find lightered stumps, dig them out and carry them to a turpentine plant. Where the wood was chipped and cooked to draw off the turpentine. Many a family in the depression kept food on the table going out into the woods and mashes and 'turpentining'.

Find yourself a large lightered stump and you have a supply of 'fat lighter' for life. I have seen it sell for about $5 for a handful. Probably considerably more now.