Smegadon
Smegadon is the build up of smegma on a mans penis in jurassic proportions.
Girl: Tonight is your luck night big boy.
Boy: (pulls down pants)
Girl: I no longer wish to give you a blow job as it seems you have a large Smegadon residing on the end of your penis.
Boy: (pulls down pants)
Girl: I no longer wish to give you a blow job as it seems you have a large Smegadon residing on the end of your penis.