This concept comes from Nassim Taleb's book Antifragile (2012), in which he jovially comments about how we never see a package which has the word "antifragile" on it. Either boxes have no sticker or a sticker that says fragile. 

The analogy he is making is with long gamma (acceleration of directional exposure) because of what it would mean for something to be antifragile. He also observes that it is a word seemingly missing from the English language: something that thrives if you put extreme shocks on it, such as being shook up and down, facing extreme weather conditions, or even potential explosions and fires. 

The idea of being long optionality (long gamma) is that you can profit when price action is violent. However, with options, optionality also has the burden of outperforming time decay (short theta).