What does 抜け出す mean?
抜け出す is a Japanese verb meaning “to slip out, to sneak away, to excel” in English. It can also be translated as “to break into the lead, to begin to fall out (e.g. hair)” depending on context. It is written as 抜け出す in kanji, ぬけだす in hiragana, and nukedasu in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
あ、みんなには内緒だよ？寮を夜中に抜け出すのは厳罰だからね？
Oh, that's a secret, OK? Because slipping out of the dorm in the night is severely punished.