юлдач

Shagger, lover, live-in partner. Criminal slang (блат) covering both meanings that life tends to blur together: the one-night stand and the long-term companion. Etymologically related to юлдаш and the variants of елда; has escaped the criminal milieu and turned up in women’s forums, where it means simply “my bloke”.

насикомoе: Задрыга-антилопа арканит юлдача!
Лана Банана: а переведите на русский, я пока не всё понимаю по фене
насикомoе: ой, я сама пока писала-искала аж вспотела :) перевожу-алчная женщина в возрасте хочет увести моего мужа-сожителя.

насикомoе: The backwoods antelope is trying to rope in the stud!
Лана Банана: Can you translate it into Russian? I don’t fully understand the slang yet.
насикомoе: Oh, I even broke a sweat while writing and searching for this :) Translation — a greedy older woman wants to steal my live-in partner.

(baginya.org, 03/2016)

To shag, to screw. Derived from юлдач — the shagger becomes his own verb, which has a certain logic to it. Circulates mainly in very informal registers: forums, online diaries, texts you don’t send your mother.

Юля рыдает из-за Серёжи, дебильного идиота, который целку Иру юлдачил.

Yulia is weeping because of Seryoga, that stupid idiot that screwed the virgin Ira.

(Какие проблемы? @ nevaforum.ru, 03/2007)