To be excited, nervous, jumpy, happy, freaking out, super active, and feeling Jesus like.
ex. “I’m very exlabernt to see that one movie tomorrow."
"What... exlaberent isn’t a word?"
“Yes it is stupid. It means to be excited, nervous, jumpy, happy, freaking out, super active, and feeling Jesus like.
God your stupid"
“Oh well... I've never heard of it"
“well I guess that was your lesson of the day"
"Smooth move" is a sarcastic comment in response to a stupid or crass action and "exlax" is a pejorative reference to the perpetrator of such action. The whole term comes, of course, from the fact that Exlax enables smooth bowel movements.
The insulting capability of "smooth move exlax" runs the gamut from a mild put down (as to an friend who just said or did something reasonably stupid) to a scathing remark on the inane actions of a worthy idiot.
To a friend not watching were she is walking and who runs into a sign post: "Smooth move exlax"
OR
To a submoron who realizes he was about to miss his freeway exit and proceeds to cut across three lanes of oncoming traffic, causing angry motorists to brake and nearly crash: "SMOOTH MOVE, EXLAX!"