Top definition
An adjective describing a song that is such that it MUST be belted out no matter where you are or who you're with. It (in your mind) cannot simply be sung quietly to oneself, hummed or whistled.
It is lusty because it is a song you deem so powerful and amazing humming it would be an injustice or disrespectful toward the song.
"And I wouldn't be the same trainwreck! That I am! And I am what I am what I am.."
"Dude?"
"Can't hum a lustyditty."
by Sammie Said May 10, 2009
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