Wrangle for an ass's shadow informal verb phrase
To disagree about insignificant issues
Only idlers wrangle for an ass's shadow.
Their sweet relationship came to an end because they wrangled for an ass's shadow.
Both of you stop wrangling for an ass's shadow and start helping me clean the house.
To argue with somebody
When an argument or a fight occurs, both parties involved are responsible for it.
The verb "wrangle" should be conjugated according to its tense.
The expression derives from a Greek myth about a traveler who borrows an ass and then gets into a fight with the ass's owner because they both want to sit in the ass's shadow to stay out of the sun.