Acronym: sweet like a dick; as in awesome, sweet, cool

Adj. Something that is expected to have a long lifespan by virtue of having existed for a long time, based on the lindy effect, named for the New York restaurant Lindy's, coined by Albert Goldman and popularized by Nassim Taleb.

That mixed feeling of being SAD that you didn't go out and you feel you missed out on something, but GLAD in hindsight that you didn't because you'd feel like shit the next day and get nothing valuable done!

it's short for shit lad isn't it?!

Feeling sad and glad at the same time.

sexy lad: a guy that is sexy and "one of the boys." Seems cool.

Can also be used as a celebratory term.