hair up

== English == === Verb === hair up (third-person singular simple present hairs up, present participle hairing up, simple past and past participle haired up) (US, intransitive) To grow (more) hair. (of an animal whose body hair changes seasonally) To grow its longer, thicker winter coat. (of a person) To grow facial hair, especially after shaving; (rarely) to grow body hair. (US, transitive) To cause the fur of (an animal) to puff up or stand on end. (chiefly US, transitive) To soil or mess up (an area, etc.) with hair. === See also === haired up