Johnson

Def: To tell a provable, bare faced lie.
One who is a bare faced liar.

"He's pulling a Johnson" (lying and everyone knows it)
"He's a right Johnson" (incontrovertible liar)
"You're not telling Johnsons are you?" (parent to child)

dc;fy

Also see: DCFO, DC;FO
Frequently used in the City of London trading floors as an equally abusive retort to those who band around the very rude "tl;dr".
Can also be used in combination with other insults, e.g.:
"dc;fy;ff" - don't care, fuck you fuck face.

Rude, usually unknown poster, in response to your helpful comment: "tl;dr"
You: "dc;fy"

dc;fo

Also see: DCFO, DCFY
Frequently used in the City of London trading floors as an equally abusive retort to those who band around the very rude "tl;dr".
Can also be used in combination with other insults, e.g.:
"dc;fo;ff" - don't care, fuck off fuck face.

Rude, usually unknown poster, in response to your helpful comment: "tl;dr"
You: "dc;fo"