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1.
someone that freeloads in a basement and is oblivious to society having no social skills.

also an ogre that sits in someone else's basement eating and playing video games or watching movies

a childesh-like adult who can't get a women because he is a lame-ass loser who slaps his lips and eats like a beast
Bally wally is still down in the basement eating and playing video games using our electricity and hasn't paid rent for six fucking months.

Bally wally is like a fucking child because he is a basement dweller and stinks the place up because he is like a shit stain that won't go away.
by dammon treck November 14, 2007
 
2.
an idiot that freeloads in your basement and stinks. they don't pay any rent and just watch movies and play video games also having little social skills.
Bill is still a bally wally in the basement freeloading and stinking the place up. He's never going to end his virginity.

The dumb bally wally just stands around like a rock when we have people over.
by john lewis gregor November 13, 2007