This shirt is legen- (wait for it) dary
The nice thing about this shirt is that it works both for fans of How I Met Your Mother and rage comics. Or, you know, just people who are overly competitive.
Let your friends know that you're going to out-trivia them on all matters HIMYM-related. Or even go so far as to extend it to all matters NPH-related. But be sure you're ready to accept the challenge before you wear this shirt, because surely you're going to be expected to live up to Barney's words.
"Challenge Accepted" writ large in white ink across the front of a heathered blue, 50% cotton / 50% polyester shirt. Machine wash cold. Tumble dry low. Imported. Officially-licensed How I Met Your Mother apparel.