Green’s Dictionary of Slang

prat v.¹

1. to beat.

c.1597

Shakespeare Merry Wives of Windsor IV ii: mrs. page: Come, Mother Prat; come give me your hand. ford: I’ll prat her.

2. to go.

1879		‘Autobiog. of a Thief’ Macmillan’s Mag. (London) XL 501: When she had got a little way up the double (turning), I pratted (went) in the house.
1906		Sun. Times (Perth) 18 Feb. 4/7: One day I prats me frame out ter the races.
1912		E. Pugh City Of The World 276: Their fathers was in it, and their grand-dads [...] that as like as not pratted up the dancers of a gallows to be introduced to Death by Mr. Ketch.
1914		E. Pugh Cockney At Home 163: ‘Here’s luck!’ she said [...] An’ pratted off.
1924		E. Pugh in Advertiser (Adelaide) 12 Apr. 24/7: Take ‘prat down the dancers,’ meaning to go downstairs.

In phrases