Kiai-do: Dyslexic Aikido. Also known as "drunken Aikido", this is usually practiced in bars, accompained by much shouting.
Ukemi: The art of blending with the mat - part of what aikidoka study. The art of hurling yourself at the Earth for no good reason.
Nage-waza: The art of helping others to blend with the mat - the other part of what aikidoka study.
Shodan (male): A male who is so adept at blending (and helping others to blend) that he can wear a skirt to class and nobody in class will laugh at him because he might help them learn to blend with the mat. At high velocity.
Hakama: what shodans call a skirt so they don't have to teach quite as many people to blend with the mat (see shodan (male)).