A word used in the song Smooth Criminal by Michael Jackson, which has come to mean "the point of utmost awesomeness" in many places in the United Kingdom.
"As she came into the window, was a sound of a crescendo (SHUCKATUCKA!)"
"Hey mate, you like my shoes?" - Dude A
"Yeah, they are well shuckatucka" - Dude B
"That shirt is sooo un-shuckatucka"