The most common and most likely answer to this crossword clue is the 4 letter word MEME
M
E
M
E
More clues leading to the result MEME
- Yours truly twice passed on cultural motif
- Idea spread by twin setters
- Cultural feature this writer duplicated
- Everyman twice depicted in internet joke
- Sheds uninherited characteristic?
- Selfish clamour that’s passed non-genetically?
- Behavioural trait expressed by egoist?
- Passed on belief: a sure sign of egotism
- Rapidly spread online content displaying 17?
- Often trite image that is indicative of a big ego!
Buddy explains!

The straight part
We know that "internet joke" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case internet joke = meme.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does MEME mean?
MEME noun- Any unit of cultural information, such as a practice or idea, that is transmitted verbally or by repeated action from one mind to another in a comparable way to the transmission of genes.
- Something, usually humorous, which is copied and circulated online with slight adaptations, including quizzes, basic pictures, video templates etc.
- A myth circulating as truth; something ineffective presented as effective, or similar.
- To turn into a meme; to use a meme, especially to achieve something in real life.
- To create and use humorous memes.
- To joke around.