B737-900
Flight Attendant Current
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Returned To Gate; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft
Shortly after pushing back from the a strange odor; like rotten eggs or sulfur; filled the back galley. The B and I; as well as the jumpseater all mentioned it. It grew stronger; so we investigated where we thought it was coming from and called the Captain. While I was speaking with the pilots; the smell dissipated and grew weaker. They asked if it returned we [should] call them.A couple minutes later as we continued to taxi; the smell returned. We had [name]; a non revenue Flight Attendant in seat X and we asked if she noticed any odors. She noticed the odor and it seemed to stop around row R or so. We called back the pilots and returned to the gate.
B737 Flight Attendant reported a cabin fume event to the Captain during taxi which resulted in an uneventful ground gate return.