Thumb Test 

When fucking doggystyle, stick your thumb up the girls ass, if she takes it willingly then she has passed the thumb test so its safe to put your cock in next!!

I gave this girl the thumb test last night and she past with flying colours.... well, maybe only 1 colour!

Thumb Test by The Alvinator March 25, 2011

Thumb Test 

A thumb test is when you stick your thumb in a girls mouth.. If she sucks on it, it means she wants your friend to join in. If she spits it out, it means she does not.

You passed the thumb test bro, hop in.

Thumb Test by Mr.CJackson January 26, 2011

Thumbtential 

When a video or image looks better in its thumbnail than it does full sized.

Person 1- "Hey, did you see that video I posted on YouTube?"
Person 2- "Can I be honest with you?"
Person 1- "Okay..."
Person 2- "That video had great thumbtential... But it was horrible."
Person 1- "Oh."

Thumbtential by open_minded January 11, 2014

thumbtext 

Form of shorthand used when sending text messages on cell phones.

Thumbtext is critical in order to efficiently communicate with someone when trying to type words on a keypad that uses 8 keys to sum up the entire alphabet.

When you're driving on the freeway, there just isn't time to type out all the letters of every word. Thumbtext is the solution.

An even more time-efficient way to communicate is to use that keypad's numeric characters to enter a person's phone number then hit the TALK/SEND key.

c u l8r

wtf r u doin

txt me 2nite

thumbtext by Xebius Phoratus August 26, 2004

thumbtext 

A certain vernacular used when texting on one's cellular phone. This is done using just the thumbs and is similar in content to the average third grader's AIM conversation.

Text Message Recieved: u n 4 th prty 2nt dwg?
Text Message Sent: Dude, I can't understand that stupid-ass thumbtext.

thumbtext by Wuffbutt August 29, 2004

thumbtext 

Textin on yo cellphone....

yo im thumbtextin on the cell...thats how we use it

thumbtext by mia August 25, 2004

thumbtext 

text for a thumbmnail (small image, that you click on to enlarge it)

I clicked that thumbnail because the text below it was interesting.

thumbtext by Core August 28, 2004