What is Twannnnnnnnng?
1.
The extremely unfortunate sound that your schlong is capable of making when getting busy with a lady and the connecting string from bell end to shaft snaps from excess stress on said joining tissue.
"oh....I think I'm gonna...." twannnnnnnnng, "aaaaaaaaarrrrrrrrgggggggggggghhhhhhhhhhhhhh!"
2.
the noise that the sacred twangy thingy makes when you twang it. the location of this sacred twang is close to this school thats full of chavs and paff goes there.
"have you twanged this mornin' tom?" twannnnnnnnng!!!!!
"nice bit of twannnnnnnnng for the lads!"
See
