Deep Throat the Musket

Could mean anything

Committing suicide

Blowing a large dick

Or a fetish of putting your mouth at the end of a barrel if a gun

Someone puts a gun in your mouth.

Depends on how you use the definition

I was with Kyle last night, I deep throat the musket.

Kurt Cobain committed suicide. He deep throated the musket

I enjoy deep throating the musket.