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1. double text thumb arthritis
When one's thumbs shake, quiver, and hurt at rest due to over-texting. Usually a result of unlimited texting plans. It becomes easier to text than to actually speak to someone. Inflammation grows within the joints of the thumb and may cause swelling. May occur when dating someone extremely younger than oneself, or possibly a cougar/manther on the prowl in silent mode. Even a simple thumb's up can cause severe pain.
Manther: Ever since I've been dating this freshman babe, my thumbs hurt. Is it cause I've been jerkin off too much?

Manther Friend: When's the last time you actually talked to her?

Manther: Dude, now that you mention it, like a month ago...she only texts me all day long.

Manther Friend: You have double text thumb arthritis yo!
2. Thumb Thug
When someone acts tough through text messages, but, when they run into you, they run away.
Joe: Roger keeps sending me these texts on my phone saying he's gonna whoop my ass when he sees me.

Dave: He tried to do that to me one time. I ran into him at the gas station and called him out, he got into his car and took off real quick. Don't worry about him, he ain't nothing but a thumb thug!
3. Thumb me
September 1, 2008 Urban Word of the Day
Encourage a friend to send you a SMS on their cell phone/mobile. The thumb being the key finger used in texting a message.
Mary thumb me the details once I finish this cell phone call.
4. Thumb-Tied
When using T9 in a text message, and the wrong word is accidentally sent to someone. It's usually not an issue, unless the wrong word still has applicable meaning in the context of the conversation.

Not to be confused with Slip of the thumbs.
Used in the context of a text message conversation:

Adam: "Hey, where are you?"
Eve: "I'm gone."
Adam: "Gone where?"
Eve: "Sorry, my phone got Thumb-Tied. I'm *home*. ^^"
5. flat thumb
when the tip of your thumb becomes flat and in pain for a short period of time due to spending 30 consecutive minutes or more on your cell phone either texting someone or playing cell phone games. this excludes the iphone and the sidekick
i got a flat thumb today from texting Rose all day

i have a flat thumb from playing monopoly on my cell phone
6. thumb generation
noun: The generation born after 1985, which as teens and adolescents communicated by the use of mobile devices such as cell phones. Because wireless mobile devices are small, the thumbs are generally used to type. This led to the use of acronyms to decrease typing time.

adjective: Of or relating to the Thumb Generation.
She uses phrases like TTFN because she's part of the Thumb Generation.

ROTFLMAO is so Thumb Generation.
7. thumb-fucking
Thumb-fucking is a term describing repetitive text-messaging.
Will you stop thumb-fucking your girlfriend and listen to me for one second?

Who are you thumb-fucking?

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