The text is a playful reference to Gollum's speech from 'The Lord of the Rings' where he refers to the Bagginses and his 'precious'. It plays on the word 'precious' as part of Gollum's speech pattern and 'steals our taglines' as a humorous twist on 'steals our precious', but it does not exploit different meanings of a word or similar-sounding words for a humorous effect.
The Bagginses , they steals our taglines , precioussss . . . .