Urban Dictionary

Urban Dictionary is a crowdsourced dictionary where users submit definitions for slang terms, informal expressions and cultural references, with other users voting entries up or down to surface the most agreed-upon meanings. Because definitions are user-submitted, the same term can carry multiple, sometimes conflicting entries reflecting different communities, regions or eras of use, each written in an informal, conversational voice.

Its ads.txt file lists 85 ad systems, made up of 41 direct relationships and 65 resellers. Sales houses named include Ascendeum and the Zeta SSP used by Disqus, among others placing ad spots on the site.