During Michael Dell's battle to take his company private last year, Carl Icahn was a veritable zinger machine, cranking out relentless critiques of CEO Dell and his company via amusing one-liners and colorful quotes.
Icahn joined Twitter on June 20, 2013, with his first tweet -- a Dell joke. "Twitter is great. I like it almost as much as I like Dell."
On July 24, 2013, he tweeted: "All would be swell at Dell if Michael and the board bid farewell."