Best definition
1.To fail utterly at everything in life. (referenced to Yamcha failing at everything in the anime series Dragonball Z)2. To

have a brief successful start, followed by non-stop fail3. To build up expectations, only to have them dashed against a stone by constant fail.4. No matter what you do, you fail.5. When your best attack is the Wolf Fang Fist.6. When you peak at the beginning of life.

I was the valedictorian in high school, but i totally Yamcha’d when I got to college.

Kel Mitchell (from Kenan and Kel) totally Yamcha’d his acting career.

The day I was born was the best day of my life. After that, I just Yamcha’d

Yamcha’d: define #2
A word derived from Dragonball character Yamcha, used to refer to a person’s failure, below-average performance, or to describe a generally lame person.
Friend: “Man, I can’t believe I Yamcha’d in front of everybody…”

Best Friend: “Well, it could be worse…You could have Broly’d.”