from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Depicting or marked by great violence or zeal: a blood-and-guts book; blood-and-guts competition.
- adj. Dealing with fundamental concerns: blood-and-guts issues.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Performed with vigor, ferocity, passion, or violence (especially in competition).
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. marked by great zeal or violence
Coined in 1937. (Wiktionary)