Having the habit of talking a lot, especially about unimportant things refers to -

Garrulous (adjective)

English Meaning: Having the habit of talking a lot, especially about unimportant things.
Bangla Meaning: বাচাল; বাক্যবাগীশ।
Other Forms: Garrulity [গারূলাটি] (noun) [uncountable noun] বাচালতা।

Synonyms: Talkative (বাচাল), Chattering (বক বক), Babbling (অস্ফুটবাক্), loquacious
(বাকপটু), Chatty (বাক্যবাগীশ)।
Antonyms: Concise (সংক্ষিপ্ত), Taciturn (অল্পবাদী; মিতবাক), Reticent (স্বল্পভাষী;
গুরুগম্ভীর), Self-effacing (আত্মকেন্দ্রীক), Brief (সংক্ষিপ্ত)।

Example Sentence: 
1. I had talked too much about myself and felt like a garrulous old fool.
2. Her garrulous neighbors kept her from concentrating.

Source: Lecture.