IQ

I have no idea. People who boast about their I.Q. are losers. IQ (intelligence quotient) is a psychometric method considered to measure general intelligence (or g) and derived from the fact that various tests of cognitive ability tend to have highly correlated scores for an individual. The correlations are due to a hypothesised general factor of intelligence or g. IQ correlates with educational achievement and job performance (with a coefficient of 0.65-0.75 for educational achievement and about 0.5 for job performance ). Since IQ is simply a score, it is inaccurate to claim that one "has" a high IQ or a low IQ, when it more or less means "scored high" and "scored low".

Criticism
IQ has been criticised for only measuring some sorts of intelligence and for being inadequate in that it unfairly emphasises certain types of abstract problem solving (ones which are not exactly common pastimes in poorer parts of the world). This perception has probably been reinforced by common tropes in movies and books of high IQ characters who have little "street smarts", or who possess little "common sense". Some go even further and argue that IQ tests measure social class, not intelligence.

By contrast, obsession with IQ tends to minimize the varied nature of crystallized and semi-fluid intelligence factors as described in. IQ (as a proxy for g) has become an oversimplified tool for approaching intelligence in academia, and particularly among lay people with superiority complexes. In fact, one of the key markers of good science, an underlying causative mechanism, is very poorly established for g, and thus IQ.

Another issue is that it is a normalised measure, calibrated to have 100 as the average and 68% of people in the 85-115 range under Wechsler Adult Intelligence Scale. So an IQ of 140 measured now is not the same as an IQ of 140 measured 10 years ago. By this measure people are getting less intelligent. It was never designed to be an absolute measure. Groups that boast about their high IQ generally don't retest their members periodically, presumably to avoid the embarrassment of having to cashier one of their members every now and again.

Testing outside of a formal environment for bragging rights should probably be looked on as something of a scam. Fun for bragging on social media, but little else (although there is the question of why you would brag about something you have no real control over, similar to bragging that you were born in the right place at the right time). Paying for IQ tests means that, by definition, you have an IQ below 100. Don't do it, but if you must, never own up to it.

Importantly, most adult skills heavily depend on what is called crystallized intelligence, the ability to tune one's intellectual ability towards solving particular kinds of problems, rather than fluid intelligence, the kind of broad analytical ability that IQ is intended to measure. This is not a failing of IQ as a measure of intelligence, but certainly something that people who place a lot of stock in the concept tend to gloss over.

Heritability
Though numerous familial and twin studies have found high heritability estimates for IQ, all attempts to find direct genetic relationships that drive IQ scores have failed to deliver on the expectations of that heritability. This "heritability paradox" has some explanations with serious academic weight, such as by characteristics, such as imprinting, which can be passed from parent to child without any permanent multi-generational genes attached, and common developmental factors such as nutrition and prenatal hormone exposure.