by God's teeth adverb 1exclamation 1 adverb1 •I swearBy God's teeth, I will not grant them liberties which will make me a slave! — 1850 exclamation1 •An exclamation of surprise or amazement.Once free his immediate reaction was to swear angrily, 'By God's teeth! I've been disgraced. I could swear I've eaten the Devil himself!' — 1998
