United Kingdom, June 15 -- Justin Bieber has described himself as a dad who is "not to be f**** with".

The 31-year-old pop star is married to model Hailey Bieber, 28, and they have 10-month-old son Jack Blues together, but on Father's Day (15.06.25), he took to Instagram to share the expletive message.

Alongside a black-and-white photo of himself, he wrote on Instagram: "I'm a dad that's not to be f***** with."

The cryptic post comes just weeks after the Baby hitmaker claimed that he was "tired of transactional posts" in another mysterious statement posted to his 295 million followers onsocial media.

Sharing two black-and-white selfies, he wrote: "Tired of transactional relationships

"If I have to do something to be loved

"That's no...