Exotic pair
Major vs emerging-market currency. USDZAR, USDMXN, USDTRY. AVOID.
Huge spreads, erratic liquidity, expensive to trade. Not viable for consistent retail trading. Examples like Ugandan Shilling or Turkish Lira - you'll get burned. Stick to majors and crosses.
Related
Learn to actually use Exotic pair.
Definitions are the easy part. The free first five modules put this on a real chart and make you do the work. No card required.