A dose of insulin taken by a diabetic to account for food that will raise one's blood sugar.
Did you bolus for that trail mix?
by J O'Neill January 27, 2008
a chewed piece of food, not slang on its own but see it combined with masticate to devastating effect: the bane of biology teachers everywhere.
i can't be bothered to write the example twice, just click the masticate thingy.
by nige April 19, 2004