Usualy used in motorcycling circles, to describe a female of questionable virtue, who tends to drift from house to house; bed to bed; person to person. Often repeating themselves throughout the course of a year.
A motorcycle groupy.
"So... your seeing so and so... eh"
"Yeah... I realy like her man."
"Well don't get to attached... she's a bit of a House Mouse... and Kevin just got a new Duc