лянта

By surface analysis, лен (len, “sluggishness”) +‎ -та (-ta).

• IPA^(key): [ˈlʲa̟ntɐ]

ля́нта • (ljánta) f (masculine ля́нтьо)

1. (colloquial, dialectal) female sluggard, idler

• лентя́й (lentjáj, “idler”)

• Georgiev, Vladimir I., editor (1986), “лен² [...] произв.: лянта 'мързалана' (Банско, Странджа)”, in Български етимологичен речник [Bulgarian Etymological Dictionary] (in Bulgarian), volume 3 (крес¹ – мѝнго¹), Sofia: Bulgarian Academy of Sciences Pubg. House, page 359
• “лянта”, in BGJargon.com (in Bulgarian), 2007