playmate
US
UK playmate n: (childhood friend)
SC 玩伴 wán bàn
SC 小伙伴 wán bàn，xiǎo huǒ bàn
SC 儿时一起玩耍的朋友 wán bàn，ér shí yì qǐ wán shuǎ de péng yǒu
Audrey enjoyed some relaxing time to herself while her little boy was at his playmate's house.
Cindy and Betty were childhood playmates.
playmate n: slang (lover, companion) (俚语)
SC 性伴侣 xìng bàn lǚ
The middle-aged man showed up at the nightclub with his young new playmate.