Be on (one's) shit list vulgar slang rude
If a person "is on someone's shit list", he/she is regarded with aversion, displeasure, annoyance, anger, or hatred by someone. He/she is listed as someone's enemy.
Believe me. You don't want to be on Jack's shit list. He's our General Manager's son.
Amanda has pissed me off for a week, she's on my shit list now.
He refused to raise funds for the underprivileged despite his wealth. Therefore, he was on his classmates' shit list.
The verb "be" should be conjugated according to its tense.
The noun "shitlist" was first recorded in 1940-1945.
Meaning absolutely certain or without a doubt
I am as sure as God made little green apples that Peter's the one for you, you two make a beautiful couple.