Quick Definition: When a PUA sleeps with a girl the day he meets her.
A same day lay or SDL is simply a term used to refer to a ZNS that happens during the game. A same day lay is pretty much the same thing as an SNL, but occurs during day game, as opposed to night game.
SDLs are less common than SNLs, because day game situations are usually less sexually charged than night environments such as night clubs and bars. However, it is possible to fclose girls that a PUA just met during the day, especially if she’s sexually adventurous or just plain horny.
SDLs are more common while traveling, when women are usually feeling more adventurous and are less worried about the repercussions of having sex with a stranger they just met.
I just had a same day lay with a girl I met at the mall.