When having sex with a woman, shortly after climaxing, pulling out and sprinkling sugar and cinnamon on your dick and then having the woman give you oral sex.
Hey man I gave my wife the "hot buttered churro" last night now she loves it!
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!