well well well
the game is simple
you find a song lyric, and at the end of a line add "in your panties"

ex. The Fantasy - 30 seconds to Mars

Maybe tonight we can forget about it all
It could be just like heaven in your panties
I am a machine in your panties
No longer living, just a shell of what I dreamed
Yeah, yeah, yeah

so yeah, lets have some fun with this girls
let loose (in your panties)

This Ain't A Scene, It's an Arms Race (1st stanza):

I am an arms dealer in your panties
Fitting you with weapons in the form of words in your panties
And I don't really care, which side wins in your panties
As long as the room keeps singing in your panties