A play with words based on the expression "cock blocker".

In this case the life blocker doesn't stop you from engaging in intercourse or other stimulating and fun activities specifically, but instead takes all your energy out of you, because it doesn't believe you are deserving of life.

Frequently used for parents who resent not performing abortion on their kids.
My mother just got home, so I can't stay positive or happy, she is a life blocker.
by Barbra Silver January 12, 2021
Get the Life Blocker mug.