The Hebrew word aspasuph (H628) is a rare term describing a mixed or motley multitude. It appears in Numbers 11:4 to describe non-Israelites who joined the exodus from Egypt — a mixed crowd of various nationalities who traveled with Israel and often caused trouble.
The aspasuph represents the danger of spiritual compromise through mixed allegiances. The "rabble" who left Egypt with Israel became a source of complaint and sin, craving the food of Egypt (a symbol of the world) rather than trusting God's provision. This serves as a warning against allowing worldly desires to poison the community of faith.