bird brain
Definition: (idiom, informal) A silly or foolish person; someone who doesn't think things through.
Example: Stop calling him a bird brain just because he forgot his umbrella again.
sharp as a tack
Definition: (idiom) Very intelligent and quick to understand things.
Example: Even at ninety, my grandmother is sharp as a tack and beats everyone at chess.
on par with
Definition: (idiom) Equal in level or quality to something else.
Example: The new restaurant's food is on par with some of the best in the city.
hold a grudge
Definition: (idiom) To continue feeling angry at someone for something they did in the past.
Example: She's not the type to hold a grudge — she forgave him within a day.
giving me the cold shoulder
Definition: (idiom) Deliberately ignoring or being unfriendly toward someone.
Example: Ever since I forgot her birthday, she's been giving me the cold shoulder.
pay it back
Definition: (idiom) To return a favor or kindness that someone has shown you.
Example: He helped me move last year, so I was happy to pay it back when he needed a favor.
for show
Definition: (idiom) Done only to create a certain impression, not because it's genuine or necessary.
Example: The trophies on his shelf are mostly for show — he says he doesn't even remember winning most of them.
hold it against me
Definition: (idiom) To continue to feel angry with someone because of something they did.
Example: I know I forgot to call, but please don't hold it against me — it's been a crazy week.
watch my step
Definition: (idiom) To be careful about what you do or say, especially to avoid trouble.
Example: After the warning from my boss, I decided to watch my step for the rest of the month.
playing mind games
Definition: (idiom) Trying to manipulate or confuse someone psychologically.
Example: I think he's playing mind games with you — one day he's friendly, the next he ignores you completely.
turns everything on its head
Definition: (idiom) Completely changes or challenges a previously accepted idea.
Example: The discovery of the new fossil turns everything on its head that scientists believed about the species.
out of the corner of my eye
Definition: (idiom) Seeing something without looking directly at it.
Example: I saw someone waving out of the corner of my eye, but by the time I turned, they were gone.
keeping tabs on
Definition: (idiom) Watching or monitoring someone or something closely.
Example: My parents like keeping tabs on my schedule, even though I'm an adult now.
just in case
Definition: (idiom) As a precaution, in the event that something happens.
Example: I brought an umbrella just in case it rained during the picnic.