I'll happily take that bet and walk away with a cool $2K. Meyer is a piece of sh*t and what reason does Lambo have to fabricate a story like this? Rating the force of the kick on a scale from 1-10, acknowledging while it wasn't a vicious blow it was more than a friendly bump, the verbal response after it happened, and then the interaction at practice ... just seems really unlikely one would make-up a completely false story with such specific details.
Heck, Meyer didn't even deny it. On two occasions he acknowledges kicking Lambo:
"I’m the head ball coach, I’ll kick you whenever the f*ck I want"
"When you responded to me out there on the practice field out in front of everyone. If you have an issue and don't like me kicking you, well then you keep that to yourself and you wait until after practice and after meetings and you come find me in the office and tell me privately"
If this turns out to be a complete myth, I'll eat crow, but as far as credibility and decency, Meyer is one of the last people I'd give the benefit of the doubt to.