Is the name Bosco defamatory? Or a ugandan political slur.

The Ugandan political scene has seen a number of innuendos and nicknames that seem edgy. A recent one is that of Bosco, which without splitting hairs refers to the head of state. But does it in anyway have any legal implications on any one using it in public address?
When the famed musician turned politician Robert Kyagulanyi a.k.a Bobi wine staged his historic concert, one could audibly hear the crowds chanting "tell Bosco".
Could someone be sued under defamation for such political slurs?