A popular phrase on the Internet for mail services provided by the U.S. Postal Service and similar agencies in other countries. The term has its origins in the fact that regular postal mail is slow compared with e-mail.
I would prefer the picture per e-mail, but if you have no scanner, send me a snailmail.
v. to stand stock-still staring vacantly at someone, as though looking through their eyes and out of the back of their head at something several miles behind them, preferably with mouth slightly open and with dribble seeping out of corners or (for greatest effect) middle of mouth.
My friend went right up close to one of those still-standing street-performers and just gawped until they made the first move.