A sudden reminder of the past. This can be brought about by hearing a song from high school, seeing an ex, puffing on a j in your old puffin spot, etc. Similar to a flashback.
A fitted baseball cap with a flat brim. Frequently features a much higher level of craftsmanship than an ordinary baseball cap, and orders of magnitude more expensive. A throwback worn over a doo-rag is a popular style among hip-hop artists and fans.