a. What you get when you take a huge pinch of chewing tobacco, and stick it in your bottom lip so it looks like a huge horse lip.
b. Can be used as a verb describing the process of taking a big dip.
a. Seriously, did you pinch half the can, because you've got a horse lip.
b. Don't give John a pinch, he horse lips.
Where a person has a disfigured lip that makes their lip 4 times bigger than normal.
" Dude Horse Lip is coming our way, stare at that floor!"
" Oh man did you see Horse Lip today in hockey, she actually thoguht she could play, she'd be better in net stopping pucks with her lip!"