Learn English – request: bragging & boasting but all made up of lies

This is a single word, idiom, phrase, expression request – so basically I'll take anything that fits the bill.

Basically I'm trying to translate the Chinese word 吹牛 – which dictionaries will tell you mean to brag & to boast – but it actually also refers to things that are usually all untruths and lies.

I thought, originally, that one of these would work: he's just bragging (i.e.: it's not, actually, true) – but Google only says:

brag

braɡ/

verb

?verb: brag; 3rd person present: brags; past tense: bragged; past participle: bragged; gerund or present participle: bragging

1. say something in a boastful manner.
   "he bragged that he was sure of victory"

noun

noun: brag; plural noun: brags

2. a boastful statement.

and

boast1

bəʊst/

verb

verb: boast; 3rd person present: boasts; past tense: boasted; past participle: boasted; gerund or present participle: boasting

1. talk with excessive pride and self-satisfaction about one's achievements, possessions, or abilities.

   "she boasted about her many conquests"

   synonyms: brag, crow, swagger, swank, gloat, show off, blow one's own trumpet, sing one's own praises, congratulate oneself, pat oneself on the back; More

   exaggerate, overstate;
   preen oneself, give oneself airs;
   informaltalk big, blow hard, lay it on thick, shoot one's mouth off;
   informalskite, big-note oneself
   "his mother had been boasting about how wonderful he was to all her friends"
   antonyms: deprecate, belittle

2. (of a person, place, or thing) possess (a feature that is a source of pride).
   "the hotel boasts high standards of comfort"

noun

noun: boast; plural noun: boasts

1. an act of talking with excessive pride and self-satisfaction.

   "I said I would win and it wasn't an idle boast"

Not really seeing anything talking about lies.

Anything about bragging or boasting that involves lies?