Synonyms for Sheepish:

adj.

all (adjective)
sheeplike.
humble (adjective)
apologetic, mild, self-effacing, unpretentious, selfless, plebeian, abashed, unobtrusive, submissive, plain, unassuming, meek, modest, homely, contrite, humble.
modest (adjective)
self-effacing.
shy, embarrassed (adjective)
docile, abashed, shamefaced, retiring, tame, ashamed, foolish, uncomfortable.

n.

repentant, foolish, uncomfortable, feel/look small, sorry. sheepish (noun)
sheeplike, ashamed, docile, shamefaced.
timid (noun)
tame, embarrassed, retiring, shy.

Other synonyms:

Other relevant words:
foolish, embarrassed, retiring, sorry, uncomfortable, shamefaced, shy, sheeplike, repentant, ashamed, tame, docile.

Usage examples for sheepish

  1. At other times, the same cheering and enthusiasm would result from the passage down the column of some obscure and despised officer, who knew it was all a joke, and looked mean and sheepish accordingly. – Detailed Minutiae of Soldier life in the Army of Northern Virginia, 1861-1865 by Carlton McCarthy
  2. He looked awful ashamed to think I had seen it, and, says he, with a dreadful sheepish look: The persecution I underwent from that female can never be told; she fairly hunted me down. – Masterpieces Of American Wit And Humor by Thomas L. Masson (Editor)
  3. We all looked at Pringle's face, expecting to see the embarrassed and sheepish grin. – The Kenzie Report by Mark Clifton