I wonder what's the Difference between "ran into someone" and "bum into someone" or do they both mean the same . I have Heard the " ran into someone " couple of time and "bum into someone" few times (actually only once) so do it means the phrase "bum into someone" in not very common or you can only use this phrase in certain situations .
Both mean the same= to meet someone by chance .
Being "run into" informal, perhaps this is the fact that makes it much more
commonly used than bump into.