C-striking is the action of one male asking another female out, for another male. This can be done with the other males knowledge or without. In many cases the C-striked male will be angry with the stiker. It is often considered to be a cruel thing to do. Sometimes the striked male may simply not have the balls to ask the girl and the other male does it for him under his consent.
"Scott liked Meghan, but didn't want to ask her out."
"So joe C-striked scott, and asked Meghan if she wanteed to go to the movies with Scott."