hail a cab
To cause a taxi driver to stop and give one a ride. (To do so, one stands near the curb facing oncoming traffic and raises one's arm as a taxi approaches.) It's so crowded here that I'm having a hard time hailing a cab. I hailed a cab so I wouldn't have to lug this stuff all the way home.
hail a cab
and hail a taxito signal to a taxi that you want to be picked up. See if you can hail a cab. I don't want to walk home in the rain.