1) a picture made from an artistic combination of bits of paper, clothes, photographs etc (collage)

2) small bits of coloured paper (to be) thrown at weddings (confetti)

3) bits of worthless matter which sink to the bottom of liquid in a glass, bottle, barrel etc (dregs)

4) bits removed by filing (fillings)

5) tiny, hard bits of stone, sand etc; the quality of courage and determination (grit)

6) bits of broken stone, rock or brickwork (rubble)

7) a small bits of dead skin on the scalp (scurf)