By God! Definition 1 of 2Pro Tip 1/3Expressing Awe Use it to show that something impresses you or is hard to believe. By God, that's a huge building! Pro Tip 2/3Emotional Weight It adds an emotional impact to your statement, signaling you're moved or excited. By God, she's won the race! Pro Tip 3/3Cultural Sensitivity Some people may find it offensive due to the religious reference. He exclaimed, 'By God!' and some looked disapproving.