I would have said schlong.
4 seconds sound clip from the The Cable Guy (1996) movie soundboard.
You can hear this line at 01:10:37 in the Blu-ray version of the movie.
Quote context
[...]
- Penis.
- Vagina?
- Yes!
- She got vagina! She got vagina!
- Hey, now we're starting to get this!
- Come on, Steven. Don't be a stick in the mud.
[...]