Funny 21st Birthday Memes: One of the finest things about hitting the age of 21 is you are about to pass out the college and all set to step into a completely different world. In short, being 21 is all about stepping into a real world that is full of glittering opportunities, ruthless people, full of encouraging people, backstabbers, and god knows what else. One must celebrate his or her 21st birthday like a grand festival because this golden age never comes back. If you know anyone who is celebrating his or her 21st birthday, make them laugh like a baby on their birthday by sending happy 21st birthday memes that are full of wit and sass. We bet there is nothing more funny and unique than our compilation of funny 21st birthday memes as birthday gifts.