He is just shamming Abraham to avoid his chores.
sham Abraham
idiomTo pretend sickness or insanity.
Origin
first recorded 18th c.First use appears c. 1752. From sham + Abraham man (“a beggar who pretends to be ill”)
The soldier tried to sham Abraham to escape the dangerous mission, but the doctor saw through the act.
Fearing the harsh consequences of his crimes, the prisoner began to sham Abraham in hopes of being transferred to a medical facility.