After doing a little Google research, I found that "hot verb" is a term used pedagogically to refer to any high frequency verb that is used in a great variety of situations with a great number of meanings depending on context. It is quite possible that only one particular methodology uses the term. It doesn't seem to be very widespread.
get, make, and take are probably the top three, but go, have, and do would seem to be candidates.
I got sick; I got a letter; I got around to it later; I got the point; ...
I made a cake; I made a complaint; I made a U-turn; I made room for them; ...
I took my time; I took sick; I took the money; I took my friends to dinner; ...
I believe I've heard a completely different term for these. It's something like "meaningless" verb or "placeholder" verb. I think the term may be "vacuous verb".
CJ