TDY is an extremely popular acronym in the military. It stands for temporary duty. Frequently when military men leave for a trip, they get the urg to sleep with other woman. A person who goes on trips without there spouse and frequently cheats on them is said to have "TDY eyes".

v. collectively or individually finding someone/something to blame for a problem, as opposed to brainstorming which connotes finding solutions to a problem

n. the act of finding someone/something to blame for a problem

(from a TV ad for HD television)