Quirk

1) a peculiarity of action, behavior, or personality; Mannerism 


Usage : My overactive imagination was an amusing personal quirk 


2) a sudden twist or turn


Usage : He lost his money by quirk of  fate 

Vicissitude

 A change or variation occurring in the course of something

Usage:- Life is difficult and complicated,and beyond anyone's total control,and the humility to know that will enable you to survive its vicissitudes 

Turn a Nelson's eye

turn a blind eye

Usage-Prime Minsiter Dr.Singh turns a nelson's eye to the problems of citizens of India

Muzzle

Prevent from freedom of expression

Usage- Bharka Dutt attempted to muzzle blogger Mr.Chaitnaya Kunte. Its a absolute fiasco

French leave

Absence from work or duty without permission

Usage - Satish Medos don't you dare to go on French leave :-D

Fillip

A stimulus or boost

Usage-The support of Nepal came as fillip to India's stand in the UN

Visage

A persons face,with reference to the form of the features-a person's facial expression
Usage-The expression of dismay is clear in their visages