chuffed
adjective
[ tʃʌft ]
• very pleased.
• "I'm dead chuffed to have won"
Origin:
1950s: from dialect chuff ‘plump or pleased’.
chuff
verb
• (of a steam engine) move with a regular sharp puffing sound.
• "the train was chuffing out of the station"
Origin:
early 20th century: imitative.