A radio transmission in Counter-Strike, meaning:

Follow me,

but said in normal life

Anatidaephobia is defined as a pervasive, irrational fear that one is being watched by a duck. The anatidaephobic individual fears that no matter where they are or what they are doing, a duck watches.

Anatidaephobia is derived from the Greek word "anatidae", meaning ducks, geese or swans and "phobos" meaning fear.

czech chat short meaning "back"

origin of short:

word back is in czech language "zpět"
number five is in czech language "pět"