Top definition
(Noun) The act of inserting the movie "Grease" into your own, or your partner's anus; normally done out of the need for spontaneous sexual adventure or sheer hate for the film. Often confused with, the more common, "The Sound of Music Injection".
Last night, I performed a Grease Injection on myself while baby-sitting my neighbor's 3-year old.

"Did you inject her with 'Grease' last night?"
by Dr. Dumperdoodle May 06, 2010
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug