i'll have your guts for garters

The phrase "I'll have your guts for garters" is an idiom that is used to express extreme anger, threat, or a strong desire for revenge. It suggests that the speaker is metaphorically threatening to harm or kill the person being addressed so intensely that they will need their intestines (guts) removed and used to make garters, which are decorative bands worn around the legs to hold up stockings. It signifies a severe form of retribution or punishment.