When Someone Cums in a partly used bottle of Ranch Dressing and puts it back in the fridge for others to use.
I caught My roommate Ryan using the Ranch I bought without asking me first. That's why I Butter Milked the ranch last night. One ever caught me Butter Miking the Ranch!
A guy that always has a little giz on his penis tip.
Michele: Rob is such a butter Mike he needs to learn to wipe his tip. He zippers are always rusty from the giz.