Green’s Dictionary of Slang

1. wonderfully, in an excellent manner.

1866

J. Greenwood Little Ragamuffin 304: Here you are dressed rippin’ and all half a head bigger.

2. (also rippingly) a general intensifier, completely, utterly.

1909		G.R. Bacchus Maudie 37: ‘I’m rippingly hungry’ [Ibid.] 50: ‘I know you two boys will get on ripping’.
1987		(con. 1970s) J. Pistone Donnie Brasco (2006) 326: On our way to the hotel, Sonny was ripping mad. I couldn’t get him to cool down about Rossi.
2013		K. Shea ‘Having Chiqui’ in ThugLit July-Aug. [ebook] ‘Got me a whole other sixer in the fridge [...] these babies are rippin’ cold’.