Learn English Online - Idiomatic Expressions
Definition of Idiomatic Expressions

What does prick of conscience mean?
Meaning of idioms with examples...
prick of conscience
The phrase a prick of conscience is an idiomatic expression that indicates a feeling of guilt. The phrase makes reference to a feeling that causes a sharp mental pain or remorse.Another variation of the idiom is prick somebody's conscience. It means to make someone feel guilty.
Example(s):
The picture of the dead Syrian boy lying face down in the sand on a Turkish beach pricked my conscience.
This idiom is in the crime category