noun
off guard; defenseless; no guard
Wasei-eigo from English 'no guard'. Used in contexts like boxing, martial arts, or metaphorically for being unprepared or vulnerable.
wasei-eigo (Japanese-coined English), from no guard
彼はノーガードでパンチを食らってしまった。
He took a punch with his guard down.
試合中に一瞬ノーガードになった隙を突かれた。
During the match, he was caught off guard for a moment and got hit.