bump into
US /bʌmp ˈɪntuː/
UK /bʌmp ˈɪntuː/

1.
to meet someone unexpectedly
:
•
I didn't expect to bump into you here!
•
She often bumps into her old classmates at the supermarket.
2.
to hit something or someone accidentally
:
•
He didn't see the pole and bumped into it.
•
Be careful not to bump into anyone in the crowded hallway.