Faux Sure
Faux Sure is when one person promises or tells another person to definitely count on him/her/they/we/us/he-she/she-he/she-he-he/he-she-she to do a specific something or favor and then totally lets the person down by failing to perform.
That was the third time that Dick Johnson let Virgina down with a Faux Sure to get her in bed by 10:00 PM.