(adj.) When you scroll through your social media feed, and stop to watch a piece of content, it's thumb-stopping content. In advertising it's used to describe very creative content developed for mobile platforms that users will actually watch.
Woaaaw! Did you see that latest video Nike created on Instagram? That's real thumb-stopping content!
When doing a chick doggy-style and you are too drunk to find the hole, you use your thumb as a marker. Put your thumb in the hole that you want to go into and use it as a guide for your penis. Also works well in the dark.
I was so drunk I had to thumbscope that chick just to find the hole.
the ancient and effective martial art of striking an opponents stomach with one’s extended thumb. Most often used today by middle schoolers attempting to prank each other.
“Yo Matthew, I just used thumbstom on Chad in the hallway and he is stillbuckled over in pain lmaooo”