Tit Mouse= Not a tit, nor a mouse...but yes, it is in fact a small blue bird that sings.

Hamster= not a ham, nor does it stir things...it is in a fact a small fuzzy rodent that has, in recent years, been domesticated in north america as a common house pet.

Marijuana= not mary as in jesus's mother, nor is it the female form of the mexican name Juan. It is in fact a drug with immeasurable medicinal value that goes quite well with food and getting your dick sucked.