Vocabulary
Form
to leave (something) undone; to neglect (a duty, task, etc.); to break (a promise, appointment, etc.); to stand (someone) up
verb
vt
Example sentences
先生（せんせい）が怒鳴（どな）り始（はじ）めると生徒（せいと）たちは一切（いっさい）をすっぽかして逃げ出（にげだ）した。
When the teacher started shouting, they dropped what they were doing and ran out.
上司（じょうし）との約束（やくそく）をすっぽかした。
I skipped out on my appointment with my boss.