These are the two words that most foreigner (oyinbo) would caught off guard when in Nigeria.
The first one is wash, it does not reflect the actual act of cleaning for wanting a hygienic environment and the other one is dash, has anything to do with running or sprinkling small quantity seasoning into cooking.
Washing
Let us take a closer look at wash or washing.
Scenario 1: Ademola just got his first wheel after saving enough money to buy one by saving his .... Later that day, he brought his mom and dad (btw he is still single) to an eatery where they ate and celebrate his success and pray for more success in the future.
Scenario 2: Madam just turned 40! A big milestone in her life and since she is 'Madam', powerful and influential in its own right; decided to pull the stops and celebrate with her colleagues at office. On her birthday, she bought packed foods, cakes and drink for everyone in the department and selected few outside the group.