What are some alternatives?
When comparing Slang-Dictionary.org and Eko, you can also consider the following products
The Online Slang Dictionary - Learn thousands of real slang words or add your own.
ECG for Apple Watch - ECG app and irregular heart rhythm notification
Dictionary.com - Dictionary.com is the world’s leading digital dictionary. We provide millions of English definitions, spellings, audio pronunciations, example sentences, and word origins.
SlangSite.com - SlangSite.
Lingoes - Lingoes is an easy and intuitive dictionary and text translation software.
SayWhat - A fun and informative Video Urban Dictionary.