An unspecified amount of time when talking about something that happened a while ago. As someone would say- 'that was bricks ago' or 'that was a few bricks back'. It is usually a longer period of time depending on circumstances. Often used when discussing social events, drama, hook-ups, parties, bad choices, and gossip.
"when did you take APUSH?'
-"Oh bruh, that was bricks ago."