Underdresed or Underdressed: How To spell?
The word Underdresed is misspelled against Underdressed, an adjective meaning "Not dresses enough."
Underdressed has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings underdre & ed which should not be misspelled with single 'S'
Wrong Spelling:  underdre-s-ed  Correct Spelling:  underdre-ss-ed 
Explore spell check of Underdressed to spell without errors.