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]
(..) There's going to be plenty of rain. Wind, thunder, lightning. - It's going to be one hell of a storm. - Thanks. Nice talking to you. Maybe we'll bump into each other again in the future. DOC: Or in the past. MARTY: Doc, Doc! Come in! BIFF: Where's that punk Calvin Klein, anyway? (..)1989 Back to the Future Part II