Had the lbs change a flat today. Got a botrager 23c folding. There is no max pressure labeled on it so I should assume it can take around 140, right?

Till it blows, yes.

i never try over 110, personally

Im not sure why you'd want to whack it all the way up to 140psi.. As ZiP said above. Hit it to 100-110 PSI and call it good.

How heavy are you? You must be a gorilla if you need 140psi. I'm around 160lbs and run around 100psi on a 700 x 23. Any more and the bike starts skipping around on bumps, especially during cornering.
All tires have a pressure rating on them. I suspect it may even be a legal requirement. Sometimes it is just embossed somewhere on the sidewall.

110 is where it's at, anything lower and riding is sluggish. Just check on it every week or so.

edit: I don't think any clincher can do 140. That's one of the reasons tubulars are used on the track.

^ this. The max pressure isn't really relevant. Neither are blanket statements about what pressure is "right." Use the right pressure for your weight, and for your riding conditions.

every time I see that chart it makes me feel fat cuz i'm off the chart.

the panaracers on my bike show max psi as 150. i think most clincher rims wont take high pressure though (if i remember its something like 120-130 max on most clincher rims). i have yet to pump them up beyond 110.