Green’s Dictionary of Slang

Christmas; also attrib.

1999		K. Sampson Powder 436: Where you gonna go for Chrimbo, like?
2001		K. Sampson Outlaws (ms.) 15: He sees McKenna, his next door neighbour on this side, luggin in a big mad set of Chrimbo lights.
2004		P. Howard PS, I Scored the Bridesmaids 208: The one I got as a Chrimbo present.