Git

British colloquialism for a fool or worthless person as in ‘silly git’ dates from the mid-20th century and is a corruption of the word ‘get’ from ‘beget’ in the progeny sense. Get was Northern dialect for bastard and hence the corruption to git, a worthless person. Git is also an Americanism, meaning to go away or clear off and dates from the mid-19th century, a corruption of ‘get going’. See also Get-go.