To talk, to chatter. Used when someone talks rapidly, loudly, and without pause, like a machine gun (она весь вечер трещала по телефону — “she was rattling on on the phone all evening”).
Лена села за стол и принялась трещать без умолку.
Lena sat down at the table and began to chatter on and on.
(antiseptinen @ sextalk.ru, 08/2011)
