mark one's own homework
To assume the role of evaluating one's doings when a disinterested party is required.
Meaning adapted from Wiktionary, available under CC BY-SA 4.0.
“You cannot mark your own homework when judging this contest.”
“The committee refused to accept the report because the manager was essentially marking his own homework.”
“It undermines the integrity of the entire regulatory process when a corporation is permitted to mark its own homework regarding safety standards.”
- 01
abound in one's own sense
To follow one’s own inclinations and opinions.
- 02
ace up one's sleeve
A surprise advantage of which others are not aware.
- 03
act one's age
To behave in a manner appropriate to one's age.
- 04
act one's age, not one's shoe size
Synonym of act one's age (“to behave in a mature manner; to avoid being childish”).
- 05
afraid of one's own shadow
Exceptionally timid.
- 06
air one's dirty laundry in public
To reveal one's sordid secrets to the public.
- 07
air one's dirty linen in public
Synonym of air one's dirty laundry in public.
- 08
albatross around one's neck
A characteristic, possession, associate, or previous deed that hinders one's ability to succeed.
Last updated August 10, 2026