Is this a string bet?

[fyodor]

Went out to Casino Rama last night to sign up for their next tourney. After driving all that way figured I may as well play a few hands. No waiting list for the 5/10 and one table was actually shorthanded which is bonus for me as that is pretty much all I have been playing lately.

Anyhow one hand I am not in flop is AA7 Turn is a 5. Just 2 guys in. Guy on my left tosses in 2 $5 chips. Guy on his left tosses in 4. Immediately notices that one of his 4 chips is actually a $25 chip so he pulls it back and replaces it with a $5. His whole transaction took maybe 2 and a half seconds. 4 chips in and then replaced the big one with correct value.

Dealer immediately calls it a string bet. Neither player says a thing. I don't really care about him losing the bet but I don't want to be called on the same thing myself so I speak up for future's sake. "He tossed in 4 chips at once, noticed one was a $25 and immediately replaced it. That's not a string bet."

Dealer calls over his boss. Explains the situation succinctly and correctly. Boss says "That's a string bet." They take the raise back.

Happy ending for the player is river is a blank. They both check. First player turns over A7 for flopped boat. The guy that had to pull his raise back turns over A5 for a turned smaller boat.

Anyhow is my definition of string bet deficient? No way do I think that was a string bet. Comments?