Definition of it was my pleasure in the Idioms Dictionary. it was my pleasure phrase. What does it was my pleasure expression mean? Definitions by the largest Idiom Dictionary. 2 days ago · The meaning of MY PLEASURE is —used as a response to someone who has thanked one for doing something to say that one was happy to do it. How to use my pleasure in a sentence. You can say 'It's a pleasure' or 'My pleasure' as a polite way of replying to someone who has.... Click for English pronunciations, examples sentences, video. Definition of It's My Pleasure in the Idioms Dictionary. It's My Pleasure phrase. What does It's My Pleasure expression mean? Definitions by the largest Idiom Dictionary.