Word: 背心 (bèixīn) 背心 dictionary entry bèixīn sleeveless garment (vest, waistcoat, singlet, tank top etc) Full dictionary entry for 背心 Example sentences using 背心 2 sentences, showing page 1 of 1. 他脱了背心。 Tā tuōle bèixīn. He took off the wife-beater. 我找不到我三件套的背心。 Wǒ zhǎo búdào wǒ sān jiàn tào de bèixīn. I can't find the waistcoat of my three piece suit.