Mother is the formal term for Mum
When i need to see you mum :D
myopia
thereupon
amendment
mum A term that equals mom in british. Exampl: Ron Weasley: But mum!
u mum pushy
ya mum
Blacking out (less formal) or losing consciousness (more formal).
Current events
An argumentum is a formal term for an argument.
tier
The formal term for body language is nonverbal communication. It includes gestures, facial expressions, body movements, and posture that convey messages without using words.