I am a 28yo white male, and for the last few weeks I have developed a pain near my anal opening. It has worsened over this time and I then noticed a squishy lump
Reagin test. You can read about it here: http://www.medterms.com/script/main/art.asp?articlekey=9851
If this is the correct test, you need to check with your doctor again and follow up with further treatment, if necessary. And keep in mind there can be false positives and false negatives in all testing.
If you don't understand an abbreviation a doctor, a nurse, or a lab report uses be sure to ask. It's their job to make sure the patient understands what needs to be done. Sometimes they forget they're speaking to 'laypeople.'