hate (one's) guts
To utterly despise one; to feel nothing but hatred for one. I know for a fact that Stacy hates my guts. She told me to drop dead last time I saw her. He doesn't hate your guts, Paul. He's just mad that you lied to him.
hate someone's guts
Fig. to hate someone very much. Oh, Bob is terrible. I hate his guts! You may hate my guts for saying so, but I think you're getting gray hair.