Here’s how Wikipedia sums it up:
"Merry Christmas from the Family" describes the Christmas gathering of a fairly dysfunctional Texas family whose merrymaking—which includes drinking alcohol, carving a turkey, watching a televised ball game and smoking cigarettes—seems to be punctuated with Christmas music and the need to run to convenience stores for additional supplies such as fake snow.
"Merry Christmas from the Family" is pure genius. Take a listen and enjoy the excellent video.
I hope you had a very merry Christmas. And Happy New Year!