This is simply due to the way the search algorithm works.
The Urban Thesaurus was created by indexing millions of different slang terms which are defined on sites like Urban Dictionary.
Note that due to the nature of the algorithm, some results returned by your query may only be concepts, ideas or words that are related to " term " perhaps tenuously.
As you've probably noticed, the synonyms for " term " " are listed above. Please also note that due to the nature of the internet and especially UD.