Any small, weak, and/or insignificant person. Alludes to a pint, a unit of liquid measurement. Don't go picking a fight with me, half-pint, or I'll knock you into next Tuesday!That new half-pint they hired as a CEO is totally incompetent.
You cannot get a quart into a pint pot.
Prov. You cannot fit too much of something into a space that is too small. That dog is simply too big to get into this kennel. You can't get a quart into a pint pot. Our refrigerator isn't big enough to fit that watermelon in. You can't get a quart into a pint pot.