Repeating Alphabet

Abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz.

Explanation

Explain Bear

Listen up, smarty pants! This joke is so dumb, even I, Explain bear, can barely explain it. It's just the alphabet repeated over and over. The 'humor' comes from the fact that it's so unbelievably pointless, it loops 4 times. Now go back to your comic books, kid.