What does blot 'em blot 'em mean?

blot 'em blot 'em meaning in Urban Dictionary

1. slang for "Gotcha!" or basically when you see your friend proved incorrect or seem like an ass, exclaim "Blot 'em!" therefore everyone knows. 1. slang for "Gotcha!" or essentially if you see your buddy proved wrong or appear to be a butt, exclaim "Blot 'em!" so everyone knows.