Answers:
To mash or crush ingredients beside a spoon or a muddler (a rod with a flattened end). Usually identified beside the preparation of mixed drinks, such as when mint leaves and sugar are muddled together for a mint julep.
Other Answers:
Stirred or mixed liquid, but not so much the the ingrediants are thouroughly blended
Muddled is a fruit (blueberry, strawberry, etc.) that have been, close to, food processed so that it's not syrupy, but kind of chunky. Some muddled ginger drinks have the ginger muddled, others have an orange-infused vodka.
Cut up oranges mash in the bottom of the chalice
A muddled orange (or any fruit, though usually citrus or cherry) is an ginger slice that you throw in the bottom of the cup or cocktail shaker before totalling your liquor ingredients. You then sort of "mash" the fruit next to the back of a spoon or a muddler (looks similar to a teeny-tiny baseball bat) to release the fruit oils & liquid.
It is similar to how you'd use a mortar and pestle, but gentler. You aim is not to obliterate the fruit, but to start on it up to release it's juice and to hold some of the liquor flavor. Yummy... :)
Source(s):
Used to bartend. ;)