Yes I didnt define choking but mostly I am defining it as taking/not taking care of business in big games. OSU has had very few times they lost inexplicably to unranked teams when they were a top 5 or better ranked team. Any loss after Penn St in '02 would have been a choke but the Michigan game was THE ticket to the desert and all knew it.
The 03 loss to Wiscy was as #1 but it was early enough(game 6 I believe) that we still had time to get back..... til the Mich loss.
Any loss prior to Michigan in 06 would have been a choke, as heavily favored as the Bucks were usually, but again we rose to the occasion against Mich and won when everything was on the line.
I agree about LSU '07 and USC '08. LSU was much closer than the score indicated. We were not beaten by a team at a different level. They made more plays, we had some costly stupid penalties and............ we essentially were on the road. They rarely stopped us that night but we stopped them fewer. But it was not men against boys, the way '06 appeared. USC was way better at that time of year but that was far from a choke.
Unfortunately too many CFB conversations start out as both guys playing defense to the "Your team sucks" kind of garbage and dont really look to shed light, only bring heat. Choker is one of those terms