- (Austria) Schwiegerschwager
The Austrian form Schwiegerschwager is from schwieger- "-in-law" and Schwager "brother-in-law". The element schwipp- of Schwippschwager is of unclear origin but may be partially related to schwieger-.
- co-brother-in-law: the brother-in-law of one's spouse; that is, the husband of one's sister-in-law (one's spouse's sister's husband), or, the brother of one spouse in relation to the siblings of the other spouse.
- (in the plural) The relationship between two people who marry siblings: Men whose wives are sisters, etc.
- co-brother-in-law: the brother of one's brother-in-law or sister-in-law; that is, one's sibling's spouse's brother (one's sister's husband's brother or one's brother's wife's brother).
- (in the plural) The relationship between two people whose siblings are married to each other: Men whose brother and sister are married, etc.
- Schwippschwager in Duden online