A style of dress where the person (most often male) wears a shirt or vest but is naked from the waist down.
Wife: Honey are you ready to go my mothers place or what?
Husband: Yep, lets do this. You can drive. (exits bedroom)
Wife: *gasp* WTF! put some pants on, you can't go round all porky pig styles. Mum doesn't want to see your junk.