A "
weasel word" is a word that is intentionally ambiguous or misleading. Marketing is known for using a lot of "
weasel words".
Teddy Roosevelt (26th President of the United States) popularized the term in 1916. The original come from a short story of Stewart Chaplin in 1900. Weasel words were "
words that suck the life out of the words next to them, just as a weasel sucks the egg and leaves the shell".
See, for example,
Watson's Dictionary of Weasel Words, Contemporary Cliches, Cant and Management Jargon. 2004. ISBN 978-1740513210.