Coup

coup [ koo ]
[ noun ]

MEANING :
1. a clever action or accomplishment
2. a very successful move or a brilliantly executed stratagem
3. a takeover or a sudden appropriation of power or leadership

USAGE EXAMPLE 1 :
The presidency had to be won in a free and fair election and not by a coup.
USAGE EXAMPLE 2 :
The protesters are supporters of former Prime Minister Thaksin Shinawatra, who was ousted in a bloodless military coup in 2006.