1gut 
/ˈgʌt/ noun
plural guts /ˈgʌt/ noun 1 guts [plural] a : the internal organs of an animal
▪ the guts of the fish ▪ fish guts [=entrails]
b informal : the inside parts of something
▪ the guts of a machine
c informal : the most important parts of something
▪ the guts of a business deal 2 guts [plural] informal : courage
▪ That decision took a lot of guts. ▪ I didn't have the guts to do it. ◊The expression no guts, no glory is sometimes used in informal U.S. English to mean that if you do not have courage, you will never achieve success and fame. 3 [count] informal — used to talk about feelings, ideas, etc., that come from your emotions and from what seems true or right rather than from logic or reason ▪ She knew in her gut that he was lying. ▪ He knew he had to trust his gut [=instincts] and do what felt right. ▪ What does your gut tell you to do? 4 [count] informal : a person's stomach or the part of the body that contains the stomach : belly
▪ Her cruel remark was like a kick in the gut. ▪ He has a big gut. 5 [count] : intestine
▪ a problem affecting the gut 6 [noncount] : catgut
▪ a violin with gut strings
▪ the guts of the fish ▪ fish guts [=entrails]
b informal : the inside parts of something
▪ the guts of a machine
c informal : the most important parts of something
▪ the guts of a business deal
▪ That decision took a lot of guts. ▪ I didn't have the guts to do it. ◊The expression no guts, no glory is sometimes used in informal U.S. English to mean that if you do not have courage, you will never achieve success and fame.
▪ Her cruel remark was like a kick in the gut. ▪ He has a big gut.
▪ a problem affecting the gut
▪ a violin with gut strings
blood and guts
: violent acts or images
▪ a movie with lots of blood and guts
▪ a movie with lots of blood and guts
bust a gut also bust your gut
informal 1 : to work or try extremely hard
▪ We're going to have to bust a gut to finish this project on time. 2 US : to laugh in an uncontrolled way
▪ I thought I'd bust a gut (laughing) when you showed up in that silly outfit.
▪ We're going to have to bust a gut to finish this project on time.
▪ I thought I'd bust a gut (laughing) when you showed up in that silly outfit.
hate someone's guts
informal : to hate or dislike someone very much
▪ That guy really hates my guts.
▪ That guy really hates my guts.
spill your guts
informal : to tell your secrets or private feelings to another person
▪ What makes some people want to spill their guts on national television?
▪ What makes some people want to spill their guts on national television?
