"Feast or famine" is a colloquial expression in English referring to events irregularly distributed in time. Feast or famine writers get very little done most weeks and months, but have periods of two or three days when they try to make up for what they haven't done. They realize they are up for tenure and try to write three or four extra articles all at once. This does not work.
Their scholarly base might be very strong; they might spend a lot of time reading and very little time writing. The problem is that a feast or two does not make up for the lean times when nothing gets done. These are the writers with huge gaps in their cvs.