Bagel Dropping

Bagel Dropping: To make conspicuous reference to common Jewish cultural items.

This is generally done in order to reaffirm one's standing as a member of the "tribe". For example using words like "oy yev" as an exclamatory or referencing bagels as a uniquely Jewish cultural affect. No one who is frum* thinks of bagels as particularly Jewish; it's just Sunday morning breakfast, that's it.

*note the conflation of frum with Jewish, but anyhow...