Term used in poker referring to the act of "Instantly Calling" an opponents bet. An instacall is commonly seen against a very weak opponent, one that may have exhibited some sort of tell (ie leaning backwards or forwards in chair, checking hole cards), or just against a complete superdonk that has been bluffing at pots with deuce-seven all night. Term also implies that the player has absolutely no respect at all for the raise his opponent puts in.
You: You're damn right that was a big raise, and if you come over the top I'll instacall your lyin ass
Opponent: "I'm All..."
You: "CALL"
*Opponent: (muck)
A piece of shit install program used by many game companies to install their games onto PCs. Goes slow as hell and does much unecessary "unpacking" and other random shit and just goes extremely slow and crashes and is just plain shit.
Installshield: A real fucking winner
and how long does it take to install a 140MB demo? *sigh*