Hail the red army
This phrase is like a communist swear word, but louder. It means they're ready to fight, or at least ready to yell in a group.
At the meeting, the leader said 'Hail the red army' and everyone started clapping like they were at a concert.
My friend's mom texted me 'Hail the red army' because she was mad at the grocery store.
In the DMs, my brother wrote 'Hail the red army' and I replied with a middle finger.