Japanese term for weight gained in a loving relationship? I came across this phrase in reading a few weeks ago, and can't for the life of me find the note I made on it. It refers to plumpness in a positive sense, reaching a comfortable state of gained weight that you only find after a while in a really good, sweet relationship. Hope someone else knows what I'm talking about!

Perhaps you're looking for (pronounced as **** due to rendaku).

This word is not particularly positive nor negative/derogatory. Gaining weight itself is not a desirable thing, but some people may see it as an enviable evidence of happiness.