A B737-400 FLT ATTENDANT NOTICED A SMOKE AND FUMES IN THE CABIN AFTER LNDG. MECHANICS WERE ONBOARD IN ANTICIPATION OF THE PROB; SINCE IT HAD BEEN WRITTEN UP PREVIOUSLY.

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AFTER LNDG IN ZZZ; I NOTICED ENTIRE CABIN FULL OF SMOKE. I CALLED THE FLT DECK AND ADVISED THEM OF THE CABIN CONDITION. THE CAPT ASKED ME WHERE SMOKE WAS COMING FROM. I TOLD HIM IT WAS EVERYWHERE IN THE CABIN. HE STOPPED THE PLANE; SO I CALLED THE FLT ATTENDANTS IN THE BACK TO STAY ON THE INTERCOM AND KEEP LISTENING TO OUR CONVERSATION WITH THE FLT DECK; IN CASE WE MIGHT EVACUATE THE PLANE. I TURNED THE LIGHTS ON DIM AND WAS ASKED TO OPEN THE FLT DECK DOOR. BY THAT TIME THE PAX IN FC WERE COUGHING. I FELT BURNING AND STINGING SENSATION IN MY THROAT AND CHEST. I ALSO STARTED TO COUGH. WE HAD TWO OF OUR MECHANICS IN FC. ONE OF THEM WENT TO THE BACK OF THE ACFT TO SEE WHERE THE SMOKE WAS COMING FROM AND THE OTHER MECHANIC CAME UP TO THE FLT DECK AND TOLD THE CAPT NOT TO EVACUATE BECAUSE THEY WERE ONBOARD FOR THIS EXACT REASON. THAT THE SAME THING HAPPENED TO THE FLT BEFORE OURS. AT THAT TIME THE SMOKE BEGAN TO DISSIPATE BUT THE BURNING STINGING FEELING WAS STILL STRONG. AT THAT POINT THE CAPT ASKED IF WE SHOULD CONTINUE TO THE GATE BECAUSE IT WAS NOT THAT FAR. FLT ATTENDANTS FROM THE BACK AGREED TO CONTINUE TO THE GATE. AFTER WE GOT TO THE GATE; THE MECHANIC CRACKED OPEN DOOR R1 AND I DID THE SAME TO DOOR L1 TO GET SOME FRESH AIR IN THE CABIN. WE DEPLANED THE PAX AND I NOTICED THAT MANY WERE COUGHING AS WELL AS THE MECHANIC AND MYSELF. THE MECHANIC ASKED THE CAPT NOT TO WRITE UP THE PROB IN THE LOG BOOK; BECAUSE IF THEY DID THAT; THE PLANE WOULD HAVE TO STAY THE NIGHT IN ZZZ OR UNTIL THEY FIXED THE PLANE THEY GOT CALLED OUT FOR. THE SMELL TO ME WAS LIKE A LIQUID OR CHEMICAL BURN SMELL (ACID SMELL). AS WE WERE WAITING FOR OUR VAN TO THE HOTEL TWO PAX ASKED ME IF WE KNEW WHY THAT HAPPENED. I DID NOT COMMENT ON IT. THAT NIGHT AND NEXT DAY I STILL FELT THE BURNING IN MY THROAT. AS PER CAPT REPORT '...FLT CREW NOTED THAT ATIS RPTED THAT UREA HAD BEEN APPLIED TO RWY SURFACE.'