Hey guys, let's exercise some restraint and good judgment when quoting those warcries - they shouldn't violate org rules, or cause our Moderator staff to break out the hammer.

To topic: Wikipedia, as usually has a quite informative article on warcries, although most of them probably wouldn't qualify as "weird".

Excerpt:
"Allahu Akbar", (The Takbir) — meaning "Allah is greatest" in Arabic — was common in Muslim armies or commonly used by Muslim warriors such as Cheemas in battle, and is still heard today by soldiers throughout the Muslim world.

Sikh soldiers have historically used "Jo Bole So Nihal, Sat Sri Akal", meaning "He who cries God is Truth, is Ever Happy". This is still used by the soldiers of the Indian Army's Sikh, Sikh Light Infantry and Punjab regiments.