Usually refering to a transexuall (most of the time japanese) woman with a pencil shaped penis. penis must be over one foot otherwise it is referred to as a "qibblesnaffer".
"Yo man have you seen that new japanese girl? She has a huge pant snake"

"Yeah man its all the way down to her kneecap!"
by Midget spinner June 6, 2017
Get the pant snake mug.