May 8 (Reuters) - Bumble forecast second-quarter revenue below Wall Street estimates on Wednesday, a sign of slowing user growth and weak discretionary spending on its dating apps amid economic uncertainty.

The dating firm, which operates its eponymous app, expects second-quarter revenue between $269 million and $275 million, compared with analysts' average estimate of $278.6 million, according to LSEG data. (Reporting by Jaspreet Singh in Bengaluru; Editing by Shailesh Kuber)