Gauche (adjective)

1. Lacking social grace, awkward, clumsy.
2. Lacking tact or good manners.

Origin:

The word "gauche" is derived from the french word "gauche" which means "left" and it first appeared in the late 1700s in the english language.

Examples:

1. He was known for his gauche behavior at parties.
2. The young girl was gauche and didn't know how to behave in high society.
3. His gauche attempts at flirting were met with discomfort.
4. The gauche employee was always making mistakes.
5. The gauche host served the soup with a fork instead of a spoon.