A common turn of phrase on the internet, generally used as an expression of quiet, subdued admiration for one's wit. Especially appropriate after a particularly deft pun.

Got the covid-19 vaccine

A phrase of obvious sarcasm, used in message boards and the like, to point out that a previous post was not funny even though the creator of the unfunny post thought it was.

See also:
STFU, GTFO, gb2/

Usually a sarcastic response to somebody who obviously thinks that they have been more clever than they actually have. Seen mostly in online forums; often abbreviated ISWYDT.

Sometimes used as a sarcastic response to a dumb trick. Or a trick meant for noobs.