Swollen snug is best described as easy pussy. Synonyms include sluts, whores, chicken heads, etc.

(Noun) small vagina.

Thug life in a snuggie.

When oral sex is preformed upon the seat of a Volkswagen bug.

The act of performing oral sex in or around an establishment for cases of miller high life

Though intended to mean 'comfortable,' looking deeper into the phrase makes anyone who says it sound like a retard. Bugs (insects) are exoskeleton based; they have rough, spiny, or hard shells, and implying that you are comfortable when being coated in spiny shells just seems straight up stupid.

maintaining close contact to one's drug dealer