1980, Joy Wilt Berry, Ernie Hergenroeder, Tuff Stuff: A Children's Book about Trauma, Educational Products Division, Word, Inc., →ISBN:
Tuff Stuff teaches that while life may go smoothly most of the time, ...
2000, Margaret Cavendish, “Preface to the Reader (1655)”, in Sylvia Bowerbank, Sara Mendelson, editors, Paper Bodies, →ISBN, page 139:
… yet never to make us so strong as the strongest of Men, whose Sinnews are tuffer, and Bones stronger, and Joints closer, and Flesh firmer, than ours are …
2003, Ronald Carter, The Routledge Guide to Modern English Writing (Language Arts), Routledge, →ISBN, page 96:
It was rave reviewed in the Caribbean Times as 'the ruffest, tuffest and the boo-yacka of all modern gangster novels'.
2006, Paige Hemmis, The Tuff Chix Guide to Easy Home Improvement, Penguin, →ISBN, page 36:
TUFF METER
2010 January 20, Robert J. Elisberg, “CES 2020 -- Ohm on the Range”, in Huffington Post, retrieved 2012-09-14:
Its Tuff-n-Tiny USB flash drive is about the size of a thumbnail. … The company insists that the "tuff" part of the name is well-earned for being waterproof, dustproof and you can drive a car over it.
2011, Kristian Pope, Tuff Stuff Professional Wrestling Field Guide: Legend and Lore, Krause Publications, →ISBN:
Allmänt tuff. Jocke, han är allmänt tuff, och Krille, han är allmänt tuff. Allmänt tuff. Danne, han är allmänt tuff, och jag är allmänt tuff.
Generally badass. Jocke, he [redundant in Swedish as well] is generally badass, and Krille, he is generally badass. Generally badass. Danne, he is generally badass, and I am generally badass.
Usage notes
Often with (sometimes tongue-in-cheek) bad boy (or girl) connotations when of a person. The sense of cool has (sometimes tongue-in-cheek) connotations of (somewhat) breaking social norms as well. A motorcycle might be called tuff for example, by association with bikers, "tuff musik" would commonly be something like heavy metal (considered cool and rebellious, "edgy"), and a "tuff frisyr" would be a cool and (slightly) provocative haircut. Sometimes a bit dated (or tongue-in-cheek), for example when describing music.
1) Only used, optionally, to refer to things whose natural gender is masculine. 2) The indefinite superlative forms are only used in the predicative. 3) Dated or archaic