A tom guess is defined as a "slightly educated guess". However one cannot use the term "tom guess" unless he/she is referring to guessing on a particular question on a quiz or test/exam. Note, that a tom guess is not christmas tree or abacadaba. A tom guesser generally follows their conscious, in search for the correct answer".
Mike: psst, whats the answer to question 14?
Tom: I don't know, I "tom guessed" it.
Rex: sigh, another tom guess!
Robert: Rex, do you have a question?