top-heavy

Short definition from Wiktionary

Adjective

1. 1
   having a high centre of gravity, and liable to topple
2. 2
   having an excessive number of administrators or managers
3. 3
   Having a significant portion of the plan assets allocated to key employees to the detriment of lower-wage employees.
4. 4
   having a disproportionately large upper body, especially the bust
5. 5
   Drunk.