| rip-rap | |
| —n | |
| civil engineering broken stones loosely deposited in water or on a soft bottom to provide a foundation and protect a riverbed or river banks from scour: used for revetments, embankments, breakwaters, etc | |
| [C19: reduplication of | |
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| a scrap or morsel of food left at a meal. |
| a gadget; dingus; thingumbob. |