Blow/sod that for a lark
Definition 1 of 1
Pro Tip 1/3British Slang
This phrase is British slang. It is very informal and best used in casual conversation among friends. 
Blow that for a lark, let's just order a pizza instead of cooking.
Pro Tip 2/3Frustration Expression
This phrase often expresses a person's frustration or annoyance with a situation or suggestion. 
Sod that for a lark, I won't spend hours in traffic for a short meeting.
Pro Tip 3/3Not Worth the Effort
Use it when you believe that the effort required to do something isn't justified by the rewards. 
Blow that for a lark, it's not worth climbing all those stairs just for a view.