Английский словарь американских идиом - meet up with

{v. phr.} To meet by accident; come upon without planning or expecting to. * /When he ran around the tree, Bob suddenly meet up with a large bear./ * /The family would have arrived on time, but they met up with a flat tire./ MEET WITH {v.} 1. To meet (someone), usually by accident. * /In the woods he met with two strangers./ Syn.: COME UPON. 2. To meet together, usually by plan; join; have a meeting with. * /The two scouts met with the officers to talk about plans for the march./ 3. To experience (as unhappiness); suffer (as bad luck); have (as an accident or mishap). * /The farmer met with misfortune; his crops were destroyed by a storm./ * /The traveler met with an accident on the road./