Multiple choice general knowledge They're selling computers ____ cheap at Jack's Tech Shop. dirty dungy dirt grunge Reveal answer Fill a bubble to check yourself C Correct answer Explanation The idiom 'dirt cheap' means extremely inexpensive or very low in price. Dirt is common and has little value, making it a good metaphor for cheapness. 'Dirty,' 'dungy,' and 'grunge' mean unclean, not inexpensive.