noun
bum
The part of the body you sit on.
The toddler lands on his bum and starts to laugh.
Etymology
Origin uncertain. The buttocks word has a Middle English history distinct from the later American word for an idle person.
More examples
- These jeans are too tight around my bum.
- My bum hurts after the long bike ride.
- She brushes sand off her bum.
Forms
bum · bums