Unbeatable Vow 

A vow taken by someone that they will not beat off (masturbate) until a goal that they have set for themselves has been achieved. It is a method of motivation, used mostly by athletes.

I'm taking an unbeatable vow until I beat Conner in a race.

I need an A this quarter, I'm taking an unbeatable vow until I do so!

Unbeatable Vow by CHS XC October 1, 2010

Unbreakable Vow 

An Unbreakable Vow is a magical spell of unknown incantation, in which one makes an oath to another. If either of the two break their terms, they die.

Puja and Jatin took an Unbreakable Vow to be with each other ALWAYS

Unbreakable Vow by JatinPatraJP October 1, 2018