shoulder peak
n.— «The show aired at 5pm on a Wednesday, a daytime slot called “shoulder peak” in TV jargon.» —“Never judge a book by its clubbers” by Oliver Bennet Independent (U.K.) June 28, 2004. (source: Double-Tongued Dictionary)
Further reading
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...