A really bad bong hit, or toke. Usually causing one to gack. This hit tastes likecack. Typically caused by a previous smoker failed to finish their hit
Jad got the cackhit, look at him gack -- damn that is nasty.
A hardo is a person who tries extremely hard at everything. Most times a hardo will try very hard at things that do not require excessive effort. For example, sports practices, gym class, etc.
Wow did you see Jack at practice today? What a hardo!