The act of spilling food or drink on oneself or near your general vicinity, photographing the resulting stain and then posting it on Twitter for others to view.
Did you seeJohn pulled a shareski last night after he spilled ketchup all over his pants?
Sharpskins or Skinheads against racial prejudice founded in 1986 New York, are politically motivated skinheads heavily influenced by communism and marxist ideology. They have a romanticized version of the origins of skinhead subculture that depicts a racially harmonious late 60s Britian subculture. They are recognizable by their Trojan helmet patch with sharpskin written around it. They are opposed to racism, Fascism, or generally anything from conservative onwards.
"There's a sharpskin down the pub"
"well let's go say hello"