老板娘 (lǎobǎnniáng) means proprietress or the female owner of a business, literally "boss lady." It is a common and informal way to address or refer to the woman who runs a shop, restaurant, or small business.
老板娘人很热情,每次去都会跟我聊几句。
Lǎobǎnniáng rén hěn rèqíng, měi cì qù dōu huì gēn wǒ liáo jǐ jù.
The lady boss is very warm and friendly — every time I go, she chats with me a bit.
这家餐馆的老板娘做菜特别好吃。
Zhè jiā cānguǎn de lǎobǎnniáng zuò cài tèbié hǎochī.
The lady boss at this restaurant cooks especially delicious food.
你去找老板娘结账就行了。
Nǐ qù zhǎo lǎobǎnniáng jiézhàng jiù xíng le.
Just go find the lady boss to settle the bill.