It came from a kid saying "67" from a basketball players height, i suppose

Its a completely nonesensical meme, i'd say its funny because of its shock value. Most of the memes nowadays appear to be funny to some audiences because of the shock value from the meme appearing so random, or just being completely offensive

(Im SO sorry if my sentence doesnt make sense /gen)

Over 1000000000000000000000 people had said 67

Ty ^^

mangos = 6 letters
mustard = 7 letters
6 + 7 = 13
13th letter of the alphabet = M
m stands for mangos and mustard
wow its like i've come full circle

it means everything