Verb
swear on a stack of Bibles (third-person singular simple present swears on a stack of Bibles, present participle swearing on a stack of Bibles, simple past swore on a stack of Bibles, past participle sworn on a stack of Bibles)
To make a promise or give an assurance with great conviction.
Synonyms: swear on one's life, swear on the Bible
You ate something yesterday.You sure?"asked Simon Jace shrugged."Well,I wouldnt swear on a stack of Bibles.I think it was yesterday,though. Cassandra Clare