Bumped the chair with a knee.
Bumped a knee against the chair.
Bump up the price of gasoline.
Boxes bumping against one another in a truck.
Bumped along slowly over the rocky terrain.
An example of a bump is the act of two toy cars hitting each other.
An example of a bump is a welt on the hand.
An example of to bump is for a car to knock gently into the back of another.
US presidential nominees get a post-convention bump in survey ratings.
I bumped the font size up to make my document easier to read.