A term coined by American Psychologist Albert Ellis explaining that if you look at the things that anger, upset or frustrate you, 99 % of the time, you have a MUST, OUGHT or SHOULD in your thoughts.
when one slathers hot mustard on their private parts and uses it as a lubricant to help make masturbation more pleasurable. Usually done in desperation when no other lubricants are readily available.
After having a romantic McDonald's dinner in their car. Teens Jack and Jill experimented mustarbating eachother with the McDonald's mustard packs.