Green’s Dictionary of Slang

to sit indoors when one could/should be out enjoying the fresh air; thus stuffing n.

1927		R. Lehmann Dusty Answer 63: Why stuff indoors? Come out, Judith .
1941		J. Cary House of Children (1955) 132: On wet days we could read as much as we liked without being accused [...] of stuffing in the house .
1950		J. Cannan Murder Included 167: Babette ignored his whistle, preferring [...] to stuff indoors .
1985		Company mag. Dec. 52/2: I get a better feeling spending the day with hundreds of appreciative old people than ever I would sitting stuffing in front of the telly [OED].