The flight was overbooked, and I was the first to 'be bumped'. [=my seat on the flight was the first seat to be given to someone else]
His career hit a 'bump' in the road. = His career hit a road 'bump'. [=something happened that slowed the progress of his career]
The airplane landed 'with a bump'. [=the airplane went up again and then down when it hit the ground]
(..) [Voices Over Radio Continue] Locked and floating. You can drop us anytime. We'll catch you. Inertial damping's going off. Hold on, people. There's gonna be a little bump. What the hell was that? Pressure drop in intake three. Must've lost a shield. Let's go with it. [Voices Over Radio (..)1979 Alien