(n)advertising the excellence of one's wares; boasting; self-advertisement
彼、能書きばかり立派だけど、言うは易く行うは難し、ってこと分かってんのかなあ。 His boosterism makes it sound wonderful but I wonder if he understands how hard it's going to be to actually carry out.
statement of the virtues of a medicine; description of the virtues of a drug→Related words:
効能書き