thick with (someone or something)
Full of or containing a lot of something or a type of person. The campus has been thick with protesters ever since allegations surfaced against the university's president. The room became thick with smoke a package of chocolates I left on the hot stove caught fire.
(be) thick with something/somebody
(be) full of something/somebody: The air was thick with the scent of roses.The street was thick with reporters and photographers.