1) Feather in cap
-The new environmentally friendly 787,is a feather in Boeing's cap.
-Jason got a feather in his cap by getting 1600 in his SAT.
-Alex got a feather in his cap for getting accepted to his dream school.
Definition: an achievement that you can be proud of
Etymology: feathers related to the killing of enemy combatants can be found in the traditional cultures of the Meunitarris of Alberta; and North Dakota and South Dakota) both of whom wore feathers in their headdress: and also the Caufirs of Cabul who are said to have stuck a feather in their turban for every enemy slain. Mongols practiced something similar.
2) Bad hair day
-I'm sorry I have been so depressing, it's been a bad hair day.
-After hitting his head on the cupboard and getting in late for work, Sean was sure he was having a bad hair day.
-After getting dumped, Allie was having a bad hair day.
Definition: when one's inability to groom one's hair in the morning seems to color the events of the day.
Etymology: Originating as a humorous statement, this term was soon broadened to mean simply having a bad day, that is, a day when everything seems to go wrong. [Late 1980s]
3) High and dry
-While there was a riot on the streets, I was high and dry in my apartment.
-Caleb came out of the argument high and dry.
-After all the gangsters got arrested, their wives were high and dry because the policy could not pin any crimes on them. So they walked out with their fur coats and Prada bags.
Definition: unbothered by difficulties; unscathed.
Etymology: As if someone or something were safe from a flood. See also leave someone high and dry. This expression originally alluded to a ship that had run aground or was in dry dock. Its figurative use dates from the late 1800s.