iron out

verb irons out · ironing out · ironed out

1. transitive To remove (a crease or creases) with an iron. That shirt still has a few more wrinkles to iron out.
2. transitive To make (something) flat or smooth as if with an iron. Dilatation of this type “irons out the folds” of the urethra, giving better drainage of the paraurethral glands, stimulating circulation and promoting rapid healing, especially when small doses (7½ gr. q.i.d.) of one of the triple-sulfonamides are given as an adjunct.
3. figuratively, transitive To resolve (a dispute); to solve (a problem). Let's just sit down and iron out an agreement on this issue.

   Similar: puzzle out, resolve, work out, absolve, decipher, get to the bottom of, iron out, meliorate, cure, ravel, reason out, riddle

4. slang, transitive To thrash or beat up; to overwhelm in a fight. It was a WhatsApp message saying, 'do you want to fight Christmas time/December? Exhibition, who ever you want'. […] Of course I would [fight a YouTuber] - especially Jake Paul! I'd iron him out. He wouldn't fight me though, would he?
5. slang, transitive To kill. ‘I’ll f***king run out of the crowd with a f***king pillowcase, put it over his nut and just suffocate him.[’] […] He explained: ‘I think that’s the move because no-one’s going to iron him out and he needs to go don’t he, this geezer?[’]

   Similar: annihilate, bag, baptize, bereave of life, blight, bring down, bump off, bury, cack, compromised to a permanent end, croak, crush