Possible Clues:

• Words for detached spouse in race
• Message from one who's all thumbs?
• How you find your friend at loud show
• 'How r u?,' e.g
• Not a good thing to do while driving
• College bookstore purchase
• Type with one's thumbs
• Cell-phone message that's typed
• Be all thumbs?
• "LOL" or "OMG"