(Dean is holding John’s old baseball bat wrapped in barbed wire)

Dean Winchester (to Sam): Man! Dad loved this thing.

From Supernatural – Season 12 Episode 15: ‘Somewhere Between Heaven and Hell’ (12×15) | TV series produced by The CW

Quote meaning
This was a little nod to Jeffrey Dean Morgan who plays John Winchester in Supernatural and Negan in The Walking Dead. Negan’s iconic weapon is baseball bat wrapped in barbed wire, which he calls Lucille.