A strong password consists of random letters and numbers set out in a way that no one can run a program using your personal information to figure it out.
A weak password consists of dictionary words, places, or names – frontwards or backwards, in ANY LANGUAGE (includes the names of spouses, friends, children, pets, etc.), the same as above using the first letter capitalized or with a digit at the beginning and/or end, a pure number less than a million, your login-id, social security number, birth date, or license plate.