heavy sleeper

: having great weight

: having a high specific gravity : having great weight in proportion to bulk

: having or being atoms of greater than normal mass for that element

: to a great or overwhelming degree : with or as if with great weight : in a heavy manner : heavily

: heavyweight

: a theatrical role of a dignified or somber character

: a character in a story or play who opposes the hero : villain

: one that sleeps

: a piece of timber, stone, or steel on or near the ground to support a superstructure, keep railroad rails in place, or receive floor joists : stringpiece

: sleeping car