delusional disorder; (fig.) paranoia

to try in vain; futile attempt

absurd; fantastic; presumptuous; rash

to take rash action

presumptuous and ignorant person

to rush indiscriminately into action

to take sth without permission

wild fantasy; unwarranted thought

to jump to an unfounded conclusion

inappropriate or presumptuous demands

to make a false and unwarranted declaration

lies; wild talk; to tell lies; to talk nonsense; fantasy (literature)

to tell lies; to talk nonsense; lies; nonsense

to talk irresponsibly; ridiculous presumption talk

paranoia; megalomaniac

to alter a text indiscriminately (idiom); to make irresponsible criticism

a forced analogy (idiom); to jump to an unwarranted conclusion

ridiculous self-importance (idiom); arrogance

to be unduly humble (idiom); to undervalue oneself

unwarranted talk the listener can take or leave (idiom); sth not to be taken too seriously