green·fly 
(grēnflī′)
(grēnflī′)n.
Any of various green aphids that are pests of cultivated plants.
- have one foot in the grave
- have (one's) back up
- have one's back up
- have (one's) eye on
- have one's eye on
- have (one's) feet on the ground
- have one's feet on the ground
- have one's fingers crossed
- have one's head up ass
- have (one's) head up (one's) ass
- have one's head up one's ass
- have one's heart in mouth
- have (one's) heart in (one's) mouth
- have one's heart in one's mouth
- have (one's) heart in the right place
- have one's heart in the right place
- have one's nose to the grindstone
- have one's wits about
- have one's wits about one
- have (or keep)(one's) wits about (one)
- have (or keep) (one's) wits about (one)
- have pity on
- haversack
- haversian canal
- haversian system