
If you have questions about the conjugation of козлина or Russian nouns in general, you can practice and get feedback from a professional tutor.
К нему вчера пьяный мэр ввалился, козлина. Говорит-собирайте вещи.
Last night, the mayor barreled in, drunk, told 'em to pack their things.
Ярла, у которого между ног нет ничего, кроме козлиной бородки.
And the Earl who has nothing between his legs, but a goat's beard.