bump(redirected from bumping up)
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Related to bumping up: bumping into
1. any of the natural protuberances of the human skull, said by phrenologists to indicate underlying faculties and character
2. a rising current of air that gives an aircraft a severe upward jolt
3. Rowing the act of bumping
4. Cricket bump ball a ball that bounces into the air after being hit directly into the ground by the batsman