Definitions for back burner
Random House Webster's College Dictionary
a condition of low priority or temporary deferment:
issues put on the back burner until after the election.
Category: Common Vocabulary
Origin of back burner:
"dozens of cases were put on the back burner"
A section of a stove used to keep some pots warm while one focuses on others.
A state of low urgency; a state of low current importance.