A firm, donut shaped pillow, worn around the penis. This is used to reduce the extreme pressures of bumping on the pelvic area during crazy intercourse.
This is especially helpful when a girl is lacking in the rear.

In other words, a twankle is a "cushion for pushin"

the thing that you don’t have when you’re phones percentage is over 20

Alternative spelling and pronunciation of the word "Twinkle."

vagina (when used in prose or poetry)