The following are some idioms to describe a person who is very naughty:

Begging for nothing: describing being entangled.

Shameless: refers to a person who is thick-skinned and has no shame.

Slobbery: Describing shameless entanglement and annoying people.

To mess around: It means to be unreasonable and messy.

Shameless: Describes a person who ignores shame and insists on pestering.