A Thumb Up (NSFW)

I heard the phrase "thumbs up" which indicates approval or acceptance. But what does it mean when someone gestures "thumb up"? Is it still the same or half its known derivation?

A thumb up and something else...

Enough with the nonsense! I did record a hunk making the same gesture as above... that is after you know what <snickering>. And it's not just a simple one but a burst!

How fearless of this guy to cum in his kitchen! It's hard to do that in places where people might barge in. Well, he might be living alone.