1. swear to God - Verb
2. swear to God - Interjection
swear to God (third-person singular simple present swears to God, present participle swearing to God, simple past swore to God, past participle sworn to God)
(informal) To vigorously affirm the truth of a statement, knowing that the failure to do so may result in a punishment from God.
Synonyms: swear on a stack of Bibles, swear on the Bible, swear on one's life
swear to God
(informal) Used to indicate that the speaker is swearing to God.
Anyway, I'm sort of glad they've got the atomic bomb invented. If there's ever another war, I'm going to sit right the hell on top of it. I'll volunteer for it, I swear to God I will. J. D. Salinger
Syd was so full of whimsy as well as horrible gas. I swear to God that the early recording sessions of Pink Floyd always smelled like a strange mixture of rotten eggs, rancid cabbage, and crap. Syd Barrett
I can't believe this night. I was supposed to be applauded and instead, I'm ruined. I swear to God in heaven if I ever see that man again, I will commit murder. (Tory) Well, if you need help moving the body, you know where Kim and I live. (Pam) Sherrilyn Kenyon
I want to play trailer trash; I swear to God. Joan Van Ark
Be quiet, or I swear to God I'll take you right here. Susan Elizabeth Phillips
"I swear to God," said Ali Hussein Jassim, "if I learn who did this I will not keep silent." Source: Internet