Manotaurs

Manotaurs are creatures that are half bull and half man, very similar to Minotaurs. The main difference is that they seem to care more about virility. They live in a cave in Gravity Falls which they call the "Man Cave."

Personality
Manotaurs are known to be stubborn, aggressive, and often disagree with each other. They are easily offended by remarks regarding their manliness and will do anything to prove themselves worthy. They are feared by most of the animals of the forest and even by Manly Dan.

They show carelessness towards other creatures (e.g. Chutzpar's use of a buck to scratch his back hair). They tend to dislike creatures who do not act in ways deemed "manly," like the Multi-Bear as it listens to "Disco Girl" songs and are not above teasing others.

Abilities
Other than their superhuman strength, manotaurs have a keen sense of smell. They are able to smell beef jerky and the emotional issues of Dipper.

Traditions
To the manotaurs, strength is key, and they have no room for those who are not. They've demonstrated cannibalism when Leaderaur ate an old and weak manotaur.

The manotaurs have a very distinct ritual in which one becomes a "man", apparently consisting of 50 trials. It begins with plunging one's hand into the painhole, which is a mysterious hole in the ground that will give the hand's owner utter agony. Then, one proceeds to haul a party wagon piled with all the manotaurs, develop chest hair (or in Dipper's case, glue manotaur hair onto his chest), cross a stream filled with crocodiles, force their eyes to read motivational posters of Glory and Freedom, drink from a fire hydrant, leap from cliff to cliff, and ultimately complete a task from Leaderaur; climbing the highest mountain, and entering a cave to take a head from the Multi-Bear.

Trivia

 * They all have been seen wearing manly objects
 * Chutzpar, the first manotaur to meet Dipper, wears a kippah on his head. A kippah is a traditional Jewish head covering worn by men.