It's possible that:
* It's a regional slang term: Some local dialects might use "hugger bugger" to refer to something, but it's not widely understood outside that specific area.
* It's a playful nickname: Someone might have playfully created the term as a nickname for a friend, child, or pet.
* It's a deliberate mispronunciation: Someone might be trying to make a joke by intentionally mispronouncing a similar phrase.
Without more context, it's impossible to know the exact meaning of "hugger bugger". If you can provide more information, like where you heard it or who used it, I might be able to help you understand its meaning.