an unfunny scumbag on youtube who is undeserving of his subsribers that blackmails other people, will make fun of someone's dead friend, will advertise his shitty discord server full of braindead children, and will extort you just to steal a meme
Fuck memetastic, why is he even on youtube?
by urbandictionaryuser420 May 15, 2020
something so memelike, it's fantastic.
(used in pop culture refering to a meme or used ironically )
Teen 1: Hey, did you see my last Instagram post?
Teen 2: Yeah. It was memetastic
by henryhenryhenry5 September 30, 2015
the voices are back the voices are back the voices are back the voices are back the voices are back the voices are back the voices are back the voices are back the voices are back the voices are back
that content is pretty memetastic (extremely horrible)
by fawrza November 19, 2021
The act of being memeingful with the memes you make. Being memetastic is a trait that is really hard to achieve. Don't say you're memetastic if you make undank memes! Make memes great again.
Alexios: Anjali is so memetastic!

Jill: IKR! I'm not memetastic because I make shitty joker memes.

Alexios: you're just a meme stealing WHORe!
by Memestealingwhore October 10, 2016
a way to describe someone who uses a lot of memes frequently and efficiently
Jessica was very memetastical last night at dinner.
by Shwaan March 28, 2016
Used as an adjective to describe an amazing meme, usually being referred to as a compliment to MLG trash. Often an adjective, it can be used as a noun by adding a 4, which would make it the Memetastic 4.
" Holy crap, those jokes are memetastic!"
" Those memes are so memetastic I wanna kill myself."
by _Albert Einstein_ October 10, 2016