go for gold.
1) a phrase used to encourage/give kudos to a plan or action mentioned by a friend or family member.
2) a phrase used to express mere sarcasm towards a basic idea mentioned by someone else, no matter how mundane it could be..
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).