Very colloquial: es mucho suponer....
I am going to post some expressions which we use very colloquially over here and which are so to speak off the beaten track 
:
es mucho suponer.....wishful thinking....
Mira, la pintura ha quedado mal. Pues ha dicho el pintor que vuelve el miércoles.
Ah sí?? ¿Se supone que viene el miércoles entonces?
Pues sí, aunque esto sea mucho "suponer".......
Can you get this or is this not clear enough?
I hope you like it. 
8 Answers
Nice one! The paint reference reminded me that slang for appearance is La Pinta.
Why won't they let him in? Just look at him.
¿Por qué no lo dejaron entrar? Pues mira la pinta.
Does personas de clayidas mean the same as 'plastic people' or 'the plastics', (in other words fake or unnatural) in England? I heard it said in an episode of Código Lyoko I watched.
(I hope this I didn't need to start a new topic as this sounded like a colloquialism to me).
Los Golfos meaning in this context louts/chavs etc as opposed to Gulf or Bays did a tune fulllink text of street slang. Que pasa contigo tio became a catchphrase in the '70s because of these guys.
Claro que todo es en plan cachondeo. Oh I should also say this is Spain
Thanks Heidita, just what people who are not living in Spanish-speaking countries need. Can we have some more please ??
I'll try to put it in our phrasebook 
I hope Heidi won't mind (I've checked and there is no such thing).
Toni (morbo) made a similar thread, El español de cada día que no está en ningún libro It's very interesting, especially if we can find out which colloquialisms are shared between various spanish-speaking countries.
It is a good question if this expression is used in other countries too?
Anybody?
Maciek, the above would be something like:
Yeah...wishful thinking if you ask me.....
I get it and like it!
