The style of music in musicals. They can range from really freakin' annoying to wonderfully witty. They are used to convey an emotion in the character, continue the story of the play, create irony, or jsut about anything the writer wants.
by Ron_Thornbrash May 22, 2005
to imply that a male may not be heterosexual.
That guy is so show tunes.
by Buddy September 29, 2003
A song on a iPod or MP3 that is there for show. The owner skips the song when using their player, but keeps it anyway to impress others and show off their musical knowledge.
Kyle (looking at iTouch): You like Linkin Park too? I have an extra ticket to their concert, wanna come with?
Sara: Sure.

Christy: You don't listen to Linkin Park.
Sara: Yeah those songs are all just show tunes.
by Spam Happy September 18, 2009
This is an elliptical way of indicating that a guy has homosexual tendencies; not that there is anything wrong with that. Used in Pacfic Northwest. Most straight males abhor musicals.
Megan: "Do you think Thurmond is interested in me?"
Clarissa: Let's just say that he likes show tunes.
by Big Sky Heidi September 15, 2010