sheepish
SHEEP-ishadjMeaning embarrassed from knowing one has done something silly
Memory hook a SHEEP with an “oops” grin. The sheep tries to jump the fence, lands in the pigs’ mud instead, and looks up with an embarrassed little grin; it looks sheepish.
Grandpa gave a sheepish smile when he found his glasses on top of his head.
In context After insisting that the remote was broken, Dad wore a sheepish grin when we pointed out that he had forgotten to put the batteries in.
Similar embarrassed, shamefaced, red-faced, abashed
Opposite unabashed, brazen, confident
From sheep + -ish; at first it meant meek and timid, like a sheep.