Shab \Shab\, n. [OE. shabbe, AS. sc?b. See Scab.]

The itch in animals; also, a scab. [Obs. or Prov. Eng.]

Source: Webster's Revised Unabridged Dictionary (1913)
 

Shab \Shab\, v. t. [imp. & p. p. Shabbed; p. pr. & vb. n. Shabbing.]

[See Scab, 3.]

To play mean tricks; to act shabbily. [Obs. or Prov. Eng.]

Source: Webster's Revised Unabridged Dictionary (1913)
 

Shab \Shab\, v. t. To scratch; to rub. [Obs.]

--Farquhar.

Source: Webster's Revised Unabridged Dictionary (1913)