godan verb (-ru), intransitive verb, transitive verb
Slang derived from しくじる. Casual and often self-deprecating; used for mistakes, blunders, or failures in everyday situations.
See also: しくじる
また試験でしくった。
I screwed up on the exam again.
プレゼン、完全にしくっちゃったよ。
I totally messed up the presentation.