Hobo stick

The hobo stick (handkerchief tied in a knot at the end of a stick) is called a "bindle."

Tech check

Before a presentation requiring laptops, overheads, or powerpoints, don't count on the room being set up exactly as you need it. If you can, check the room a day beforehand and be sure that you can connect any and all cords required, or that there are no technical hiccups (ie, lack of sound, broken video, etc.)

Humans/Chimps

Humans have 46 chromosomes. Chimpanzees have 48.

Guitar terms

The way you position your hand to make a note is called a "chord." A "riff" is a chord progression.

Waffling

In making waffles with an industrial-grade Waffle Iron, be sure to coat the iron with some sort of cooking spray. Otherwise, the resulting waffle will have to be scraped off.

Eggs

open an egg carton and check its contents before purchasing it. That way, you'll be sure to catch any damaged or cracked eggs and not end up paying for broken merchandise/spoiled goods.