Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP)
Conflict Ground Conflict; Critical; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Incursion Taxiway
Flight Crew Took Evasive Action; Flight Crew Requested ATC Assistance / Clarification
Human Factors; Procedure
We called ZZZ Ground Control from the alley for taxi. We were cleared to 'taxi to XXL via C; L; North Route. As we approached Taxiway C-10; westbound on B; a B737 made a left turn immediately in front of us at C-10 from Taxiway B. If we had not stopped as quickly as we did; there would have been a collision. We literally had to jam on the brakes. We made a radio call to Ground that 'apparently Airline X is waiting for Airline Y to pass in front of us.' An unknown voice (not ground) said 'yeah; you better.' I have never seen such unprofessional and dangerous behavior from a professional pilot. It is NOT OK to turn in front of a moving airplane (us); even if they had been cleared to the gate (which we didn't hear because it happened before we were on the frequency. Ground control apologized; but the Airline Y pilot is the one who nearly caused a collision. Ground didn't tell either of us to pass behind the other; but that doesn't make right to cut in front of another aircraft.Whatever you do to a pilot who cuts in front of another airplane. Unsafe and unprofessional. Period.
[Report narrative contained no additional information.]
Air carrier flight crew reported that another aircraft turned in front of them on the ramp and caused a critical ground conflict.