Dill Pickle Moment
The sudden realization of an obvious pun that was always there but you didn't realize it until somebody told you. A reference to Dill Pickles from "Rugrats".
"This is a fucking 'Dill Pickle Moment' dude!"
"What?"
"'Chao'. 'Chaos'."
--Egoraptor and Jontron
"What?"
"'Chao'. 'Chaos'."
--Egoraptor and Jontron