It's customary to use the diminutive in order not to sound offensive in this kind of context. And yes, of course we have the masculine form, "rellenito".How about, "She's round"... Is that just "Está rellena"? And does rellenita have a masculine form? I.e rellenito?
Llenito or llenita could also work.Trying to say
She is a bit round.
Esta un poco redonda.
Context: I'm basically saying she's a bit overweight, I'm saying round in shape. It's like a more polite way of saying "fat".
Choncha/o será corto por "reconcha/o"Me sorprende no encontrar "choncha / chonchita" en el diccionario... estoy seguro haberlo escuchado en México.