Smellcome is another word defining welcome, said mischievously. It is usually combined with the word you're, and said in the phrase "You're Smellcome!"
The nextgeneration on the smell family, righthand man of worst enemy according to human biology. Ranked above smelliest.
Guy 1 : Yo dude, have you heard of Husmi's Mother Pussy Hair?
Guy 2 : Yeah man, that shit smellious!
Guy 1 : Blessed that these surgical masks are working.