A McBright is someone (usually a female) who is not very bright, lame, clueless, dumb, you know an idiot. Is one who often sticks their foot in their mouth. To speak with out giving any thought, usually in a group setting. Someone who can't come up with their own train of thought or opinion. Someone who always agrees with you.
After Doug gave his speech, Liz repeated everything he just said but in her own words, as if it were her speech, thought, and idea. Good job McBright!
by E. Knoxx Winthorpe III April 08, 2010