Bralette

Of course it wasn’t a bra top. Bralettes, itty-bitty bandeaus and crocheted bikinis are everywhere. So, too, are Daisy Dukes cut high enough to expose buttocks curvature.

Source: wiktionary

Soon sales of Victoria's Secret's most important category, bras, had started to decline as women shifted to bralettes and sports bras.

Source: wiktionary