random comments; miscellaneous notes; jottings
Refers to casual, unsystematic writings or remarks, often collected or published as a miscellany. Can be used for personal notes, blog-like entries, or literary miscellanies.
His blog consists of daily random comments.
This book is a collection of the author's miscellaneous notes from his travels.
Compound of 漫 (random, aimless) and 録 (record, write down). The exact historical derivation is uncertain, but the word follows a common pattern for Sino-Japanese compounds describing types of writing.