Top Definition
The act of rubbing and inserting your thumb in a girls ass while engaging in doggystyle sex to gage her interest in anal...
I wasn't sure if she was up for anal so i gave her the exploratory thumb to find out if she was down
by Q420 July 02, 2009
5 Words related to Exploratory Thumb

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×