Know why cattywampus was trending last week?
1706, "bone of the upper arm," originally (14c.) "shoulder," a misspelled borrowing of Latin umerus "shoulder," from PIE *om(e)so- (cf. Sanskrit amsah, Greek omos, Old Norse ass, Gothic ams "shoulder").
humerus hu·mer·us (hyōō'mər-əs)
n. pl. hu·mer·i (-mə-rī')
The long bone of the arm or forelimb, extending from the shoulder to the elbow.
Plural humeri (hy'mər-ī')
The bone of the upper arm or the upper portion of the foreleg. See more at skeleton.