Keep Bumpin That
This law from Newton explains that an object that bumps into a wall will bounce back, as the wall exerts an equal and opposite force on it.
Newton's Third Law
A pregnant woman with a prominent bulge from her womb may jokingly say that she has this.
Baby bump
The name for the feeling passengers feel as a roller coaster goes over a large bump.
Airtime
As said in her song "365", this is the reason for which you should dial 999 on your phone.
"It's a good time"
Bumps on the skin where a person has received many sunburns in a lifetime may be a sign of this form of skin cancer.
Melanoma