How could I address someone as a lickspittle coil of shit, please?

I feel he's complimenting himself there.

For that purpose:

Ты уже был в военкомате? - Have you been to (russian) recruitment center yet?

А теперь вынь русский хуй и скажи не чавкая. - Now put a russian dick out of your mouth and say it without slurping.

+15 рублей, гнида \ вот и 15 рублей заработал, мразь \ 15 рублей уже капнуло на сбер, чмо? - +15 roubles, you parasite. (it's a supposed rate of russian botfarms per comment)

Почём пост в рублях? - How much for one post in rubles?

Звонил Пригожин. Приглашает тебя полетать. - Prigozhin called and invited you to fly together. (he was killed by a bomb on a plane)

Не приближайся к окнам, не то выпадешь. - Don't stay close to windows, or else...

Пишешь из окопа (, я так понимаю)? - Did you write that from the trenches (, I assume)?

Так ты уже в Курске или ссышь? - Are you in Kursk or are you a coward? (parts of russian Kursk region are currently contested between RAF and UAF)

Скажи паляница. - Say 'palyanyca'. A specific shiboleth to tell if a person is ukrainian as they claim. Russians (me included) have a hard time saying that word due to differences in how our letters are spoken, like japanese and lollapoluza in WW2.

+ кошкажена и миска рис \ Вы заслужил кошкожена и ещё один миска рис - +catwife and a plate of rice (our common way to address someone rising in chinese social credit rating)

That's from the top of my head.