The literal meaning of 划水 is 'to row water' — that is, to move a boat by pulling oars through water. The character 划 (huá) means 'to paddle' or 'to row', and 水 (shuǐ) means 'water'. Together, they form a verb describing the physical action of propelling a vessel across water.

In modern colloquial usage, 划水 has evolved into widely used internet slang meaning 'to slack off' or 'to go through the motions without real effort' — especially in group work, online classes, or team projects. This metaphorical extension likens half-hearted participation to someone merely dragging their oar in the water without generating forward motion. It carries a mildly teasing or self-deprecating tone and is common among young adults and students.