scab

An incrustation over a sore, wound, vesicle, or pustule, formed during healing.

The scabies.

The mange, especially when it appears on sheep.

Scab was the terror of the sheep farmer, and the peril of his calling.

Any of several different diseases of potatoes producing pits and other damage on their surface, caused by streptomyces bacteria (but formerly believed to be caused by a fungus).

Common scab, a relatively harmless variety of scab (potato disease) caused by Streptomyces scabies.

To become covered by a scab or scabs.

To form into scabs and be shed, as damaged or diseased skin.

1734, Royal Society of London, The Philosophical Transactions (1719 - 1733) Abridged, Volume 7, page 631, Thoſe Puſtules aroſe, maturated, and ſcabbed off, intirely like the true Pox.

Trev walked over and leaned down, dropping a tender kiss on her forehead where the skin was raw and scabbing from the cut.

To remove part of a surface (from).

The beds shall be scabbed off to give a solid bearing, no pinning shall be admitted between the backing and the face stones and there shall be a good square joint not exceeding one inch in width, and the face stone shall be scabbed off to allow this.

To act as a strikebreaker.

Don't scab for the bosses / Don't listen to their lies / Us poor folks haven't got a chance / Unless we organize.

Nobody desires to scab, to give most for least. The ambition of every individual is quite the opposite, to give least for most; and, as a result, living in a tooth-and-nail society, battle royal is waged by the ambitious individuals.

To beg (for), to cadge or bum.

I scabbed some money off a friend.

2004, Niven Govinden, We are the New Romantics, Bloomsbury Publishing, UK, page 143, Finding a spot in a covered seating area that was more bus shelter than tourist-friendly, I unravelled a mother of a joint I′d scabbed off the garçon.