Bumping into People

To bump into something means to collide with something, or to knock against something. But in colloquial speech, it also means to meet someone unexpectedly.

For instance. Today I went to the supermarket. Unfortunately, as I was parking my car, I bumped into a lamp-post. When I went into the supermarket, I bumped into Harry Johnson. I hadn’t seen him for years, so we had a long chat beside the cat food.

Now a joke.
A short-sighted man walked into a supermarket.
Guess who he bumped into?
EVERYBODY!

Słownik:

bump into something - wjechać w coś, walnąć w coś, wpaść na kogoś (spotkać kogoś niespodziewanie)

collide - zderzać się, zderzyć się (np. w wypadku samochodowym)

colloquial speech - mowa potoczna