1.having a hard time saying something...or explaining something or even reading something.
2. having an annoyingtime saying something, explaining something or even reading something.
"'I am not gonna spend the whole day breaking my teeth over these instructions ..can you just read the booklet on your own."
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!