to ride on the handle bars or on other places upon a bike with another person. Two people upon one bike.
by Joe March 12, 2004

by Joe November 10, 2003

A slang term for the penis. As with most slang terms, can also be used in derrogatory form to refer to another individual.
"Jen was shocked when I slapped my thwock down on the table, in front of her face."
"That kid is such a thwock"
"That kid is such a thwock"
by Joe November 04, 2003

by joe November 05, 2004

by Joe July 16, 2004
