(Trademark) A type of machine for cutting weeds (=unwanted garden plants) and in places that a lawn mower cannot reach. You hold the machine in your hand and move it just above the ground, and a strong spinning plastic string cuts the grass. In the UK there is a similar machine called a Strimmer
Something hang glider pilots shout when they see a friend digging in the glider's nose on landing Or what happens to a paraglider flying the lee side in rotor as in "I just got whacked hard "
If you whack someone or something, you hit them hard. You really have to whack the ball Someone whacked him on the head. Whack is also a noun. He gave the donkey a whack across the back with his stick
v According to arch-hacker James Gosling, to " modify a program with no idea whatsoever how it works " (See {whacker} ) It is actually possible to do this in nontrivial circumstances if the change is small and well-defined and you are very good at {glark}ing things from context As a trivial example, it is relatively easy to change all `stderr' writes to `stdout' writes in a piece of C filter code which remains otherwise mysterious
Your whack of something is your share of it. The majority of people in this country pay their whack We need to win a fair whack of the contracts. = share