In da infamous "modernization" of da classic incline-ascending pair of humans who both had "j" as da first letter in both their names, a "semenal event" is mentioned dat resulted in da vagina-possessing member of said duo's soon getting a baby-bump.
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!