Snail Fucking

When your driving (though could also be walking or biking, etc.) and the person in front of you slows down so you end up their ass or also if you’re going slow and someone comes up right behind you. In either case, they snail fucking you.

“This dude in front of us is driving so slow!”
“I know bro, he’s snail fucking you.”

OR

“This driver behind me been snail fucking me for the last three miles.”
“Then speed up stupid.”