One's best behavior, as in George never interrupts when we have guests; he has fine company manners. This term employs company in the sense of "guests." An older variant, Tell me thy company and I'll tell thee thy manners, uses company in the sense of "companions." The current term implies that one is more mindful of politeness with invited guests.

To the most extreme degree, especially a condition of perfection. For example, We've cleaned the house to a fare-thee-well, or He played the part of martyr to a fare-thee-well. This term first appeared as to a fare-you-well in the late 1800s, and the more archaic-sounding present form replaced it about 1940.