不少同性戀在出柜（對外坦白自己的同性戀身份）之前，都會找一個異性朋友假裝是自己的戀人，以此掩飾自己真實的性取向，這樣的假戀人就被稱為他的“步入式衣櫥”。

A “walk-in closet” refers to a woman who is beard or disquise for a gay man that has not come out.

“步入式衣櫥”指充當未出柜的男同性戀的假戀人、幫他掩飾身份的女人。

Example:

Tad doesn't want his boss to know that he is gay, so Julie is totally being his walk-in closet.

泰德不想讓老板知道他是同性戀，所以朱莉就成了他的“步入式衣櫥”。

（中國日報網英語點津 陳丹妮）