Like lots of really, really over the top trashtalking.

The latter episodes of Hellsing had quite a lot, and I absolutely loved it. Made me lul like a mischievous god.

Basically shit along the lines of charecters going "i'm going to purge your soul and banish you into the dark realms of hell" .etc .etc Preferably quite adult and mature trashtalking, not kiddy shit.

I have a feeling this is a bit of a stab in the dark, but we'll see...

Well I know for a fact that the majority of Naruto fights are something along the lines of 1/2 flashbacks, then 1/4 trash talking then 1/4 actual fighting. You might not enjoy Naruto so much, but Shippuden is worth looking into.

Desert Punk has some of the funniest trash talking there is. A lot of sounds really immature but it's so funny once you watch it. I'd say you should definitely check it out.

Most animes with a lot of fight scenes have a lot of trash talk. I think these include Naruto, Yuyu Hakusho and even Dragonball.
I also think that Rurouni Kenshin have trash talking but they come in the form of lecture like when Shishio (spelling?) is fighting Kenshin he lectures him about the strong will survive and the weak will perish etc.

I can think of lots of things with over the top trash talking, unfortunately most of them involve Monty Python, and thus are not anime.