for my sins

for (one's) sins

As a punishment or disciplinary action. Primarily heard in UK. Let me guess—I have to clean the toilets for my sins.
See also: sin

for my sins

As a punishment for one's wrongs. Often used humorously. In confession, the priest urged me to do some good deeds for my sins. I must have been tasked with this boring project for my sins.
See also: sin