An "oof" is an expression we make when we hurt ourselves or feel surprised.
When we bump into something or get hit with something, we often let out a quick "oof" to show that we've been startled or caught off guard. This sound can also be used in other situations where someone's surprised, like if they see something funny or unexpected. For example, if you're watching a comedy and suddenly a character slips on a banana peel, you might say "oof!" out loud with your friends to react to the silly moment. Some people even use "oof" when they're just imagining a possible accident, like when they trip in their dreams.
A sound made in pain, as when expelling air after being struck.
A sound mimicking the loss of air, as if someone's solar plexus had just been struck.
An expression of one's own physical pain.
Example: Ouch! You stepped on my toe! That hurt!
