Eating in small quantity.
To 'snack' is to eat a small quantity of food, between meals, or instead of a main meal.
Snacking may also be used in place of the term cunny lingus
or the practice of using ones tongue to sexually excite the female sexual organs.
This was used to great effect in a PC and console game called "F.E.A.R" where the hero must rescue a young woman and one of the characters says "She is still alive, I just hope no one has been snacking on her"
boy: Mom dont cook me any food tonight I have been snacking round at Lisa's place.