The crossword solutions for the term 'THAT'S MY ___!' are CUE and BOY. CUE is a three letter word that can be used as a verb meaning to prompt or signal someone to do something, or as a noun referring to a signal or hint. BOY is a three letter word that can refer to a male child or young man, or can be used as a term of endearment. Therefore, the phrase 'THAT'S MY ___!' could be used to express pride in a son or other male relative, or to express ownership of something.