津津乐道

jīn jīn lè dào

to discuss sth enthusiastically

津

jīn

abbr. for Tianjin 天津[Tian1 jin1]

津

jīn

abbr. for Tianjin 天津[Tian1 jin1]

乐

lè

happy

道

dào

road; path (CL:條|条[tiao2],股[gu3])