👉 The proverbial thumbzilla is a term that originated from the 1980s popular culture where it was used as a derogatory adjective to describe a person's lack of confidence or enthusiasm when they don't feel like doing something.
An example sentence might be: "She held her breath while she waited for him to sign the contract, but it took her thumbzilla to make a decision and move forward with the deal." This phrase conveys the feeling that despite having a high IQ, you still need to rely on your own judgment and intuition in matters of business or personal relationships.