Hate (one's) guts informal
To detest somebody
I hated his guts as I used to think that he is a bad-tempered man. However, he changed my view when I talked to him yesterday.
He hates her guts since she is a liar.
Hating their ex's guts is common among girls.
Used when one strongly dislikes or is unable to tolerate someone or something.
The verb "hate" must be conjugated according to its tense.