The terms clump, clumping may refer to:
- an organic behavior, see Clumping (biology);
- a software testing scenario, see Clumping (computer science) and LURCH;
- a methodology utilized for mapping cash flows of financial instruments in the VaR (Value at Risk) calculation;
- a small group of hills, see Wittenham Clumps.
- "clump", an iamamiwhoami song.
- Transit vehicle clumping, when one public transport vehicle falls behind schedule, and another scheduled behind it meets it in the same location