Usually done by bored people who think people care about how many negative thumbs they have on their posts.
random thumb downs on perfect definitions:
this is how they think you react:
"OMFG WHY THE NEGATIVE SCORE??? FFFFFFFFUUUUU!!!!!!111oneoneone
10👍 5👎
Fun to say when you're bored.
Even better when you get a response like:
"so i herd u liek mudkipz?"
"OMFG!!!!111 I LOEV MUDKIP!!!!11"
108👍 45👎