袒免

tǎnmiǎn
to bare one's left arm and take off one's cap as an expression of sorrow

CEDICT

Entry Composition

=1 袒 tǎn to bare
=1 袒 tǎn old variant of 袒 tǎn
2 免 miǎn
  1. to excuse sb
  2. to exempt
  3. to remove or dismiss from office
  4. to avoid
  5. to avert
  6. to escape
  7. to be prohibited