Combination of oof and mood
When someone embarrasses themself, but you relate.
"I spilled water all over myself."
"Moof."
When you want to say 'oof', but also can relate with what someone has just said.
Alex: "I live in a world of darkness."
Kate: "Moof."
Moof is a word used to say mood and oof at the same time.
My friend: "My dad just grounded me for a week :("
Me: "Moof"
A "Moof" Is when something is a mood (relatable) yet an oof (depressing) there so a Moof
John: David just killed himself
Jane: Moof