To butt is a verb. Heads is what you're butting. This idiom comes from the fact that sheep and goats and deer fight with their antlers by butting heads. This made people start saying that anyone fighting to see who's the most important person is "butting heads." It implies that they are like rams running to bang their heads together and impress the ewes.
Butting heads
jackhammers, rams butting heads ad babies crying.
Dominance
When sheep or goats want to prove who is the strongest they butt their heads together until one gives up, leaving the other the winner. In the same manner when two people try to dominate each other they may continuosly quarrel in the hope that the other one will yield, this is called "butting heads"
His aggressive mentality left him butting heads with the other kids in the sandbox.
Most of her works conflicted the ideas of Rousseau. The two were constantly butting heads.
Daily Jumble 4/12/17:The horned animals loved butting heads, even with the...Answer: RAMIFICATIONSClue Words: frame, civic, season, quaint
Cause they were known to be ancient animals that they used for there ivery and there heads to be worshiped
Animals that have two heads? There are very rare two-headed snakes, I know that for sure. Maybe some mythical animals, like dragons, have two heads.
There are animals with multiple heads, a condition called congenital cephalic disorder.
You might say you are "at odds" or "butting heads."