man bread Share definition Flag Bread that is baked so big that it will take a grown man a whole week to eat it, having 4 slices a day. Girl: OMG! That is like the biggest slice of bread I have ever seen.Guy: Yup. This is man bread. man bread by Missy_Moo December 15, 2009 0 0 Get merch Get the man bread mug. Buy Now — $32.95 See more merch