The term 'not very good' can be expressed in four different ways using crossword solutions. The first is 'FAIR', which means average or mediocre. The second is 'so-so', which is a colloquial expression meaning neither good nor bad. The third is 'C minus', which is a grade given to a student who has done below average work. The fourth is 'no great shakes', which is an informal phrase meaning not very impressive.