The Collaborative International Dictionary
bull-necked \bull"-necked`\, a.
Having a short, thick and muscular neck like that of a bull.
--Sir W. Scott. [Narrower terms: mesomorphic]
Wiktionary
Etymology 1 a. Of or pertaining to a mesomorph. Etymology 2
a. (context chemistry physics English) Of or pertaining to phases of matter intermediate between solid and liquid; of or pertaining to liquid crystals.
WordNet
adj. having a robust muscular body-build characterized by predominance of structures (bone and muscle and connective tissue) developed from the embryonic mesodermal layer [syn: muscular] [ant: ectomorphic, endomorphic]
Usage examples of "mesomorphic".
Sammy killing Sammy was how I figured it, because the only person capable of kevorking a drugged mesomorphic maniac like Crespo would be another drugged mesomorphic maniac.