A word than can be used formally or informally
Andy said hillow as he walked by his boss
by The real John doe1.0 September 13, 2017
Get the Hillow mug.
(Hi-Low)The process of being high off of any drug, then being very depressed after, because what you have just did whilist being high.
Person 1: That shit was funny last night!

Person 2: Yeah, it was but, I felt that hillow thing afterwards.
by Chris Laufenberg September 3, 2007
Get the hillow mug.